SIST EN 60127-3:1999
(Main)Miniature fuses -- Part 3: Sub-miniature fuse-links
Miniature fuses -- Part 3: Sub-miniature fuse-links
This standard relates to special requirements applicable to sub-miniature fuse-links adapted to printed circuits and used for the protection of electric appliances, electronic equipment and component parts thereof, normally intended to be used indoors. This standard also applies to the requirements of EN 60127-1.
Geräteschutzsicherungen -- Teil 3: Kleinstsicherungseinsätze
Coupe-circuit miniatures -- Partie 3: Eléments de remplacement subminiatures
S'applique aux prescriptions particulières applicables à tous les modèles d'éléments de remplacement subminiatures adaptés aux circuits imprimés et employés pour la protection d'appareils électriques, de matériels électroniques et de leurs éléments constituants, normalement destinés à être utilisés à l'intérieur. Renvoie en outre aux prescriptions de la EN 60127-1.
Miniaturne varovalke - 3. del: Subminiaturni taljivi vložki (IEC 60127-3:1988+A1:1991) (vsebuje popravek AC:1996)
General Information
Relations
Buy Standard
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60127-3:1999
01-julij-1999
Nadomešča:
SIST EN 60127-3:1995
Miniaturne varovalke - 3. del: Subminiaturni taljivi vložki (IEC 60127-
3:1988+A1:1991) (vsebuje popravek AC:1996)
Miniature fuses -- Part 3: Sub-miniature fuse-links
Geräteschutzsicherungen -- Teil 3: Kleinstsicherungseinsätze
Coupe-circuit miniatures -- Partie 3: Eléments de remplacement subminiatures
Ta slovenski standard je istoveten z: EN 60127-3:1996
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
SIST EN 60127-3:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 60127-3:1999
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SIST EN 60127-3:1999
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SIST EN 60127-3:1999
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SIST EN 60127-3:1999
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SIST EN 60127-3:1999
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SIST EN 60127-3:1999
NORME CEI
INTERNATIONALE IEC
127-3
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
1988
Coupe-circuit miniatures
Troisième partie:
Eléments de remplacement subminiatures
Miniature fuses
Part 3:
Sub-miniature fuse-links
© CEI 1988 Droits de reproduction réservés —
Copyright — all rights reserved
Aucune partie de cette publication ne peut être reproduite ni
No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun pro-
any form or by any means, electronic or mechanical,
cédé, électronique ou mécanique, y compris la photocopie et including photocopying
and microfilm, without permission
les microfilms, sans l'accord écrit de l'éditeur.
in writing from the publisher.
Bu
reau Central de la Commission Electrotechnique Inte rnationale 3, rue de Varembé
Genève, Suisse
Commission Electrotechnique Internationale
CODE PRIX
International Electrotechnical Commission
PRICE CODE
IEC
Mewayaapopttaa 3nelcrporexHu ecaaa HoMUCCHR
• • Pour prix, voir catalogue en vigueur
For price, see current catalogue
---------------------- Page: 7 ----------------------
SIST EN 60127-3:1999
127-3 (2) © IEC — 3 —
CONTENTS
Page
FOREWORD 5
PREFACE 5
INTRODUCTION 7
SECTION ONE — ADDITIONAL REQUIREMENTS AND TEST EQUIPMENT
Clause
7
1. Scope
7
2. Object
7
3. Definitions
9
4. General requirements
Standard ratings 9
5.
6. Marking 9
7. General notes on tests 9
9
8. Dimensions and construction
11
9. Electrical requirements
TABLE 1 15
TABLE 2 17
FIGURES 18
STANDARD SHEETS
SECTION Two —
Standard Sheet 1 — Sub-miniature fuse-links
Quick-acting, low breaking capacity 25
Standard Sheet 2 — Sub-miniature fuse-links
29
Quick-acting, low breaking capacity
Standard Sheet 3 — Sub-miniature fuse-links
Quick-acting, low breaking capacity 33
Standard Sheet 4 Sub-miniature fuse-links
—
Time lag, low breaking capacity 37
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SIST EN 60127-3:1999
127-3 (2) © IEC — 5 —
INTERNATIONAL ELECTROTECHNICAL COMMISSION
MINIATURE FUSES
Part 3: Sub-miniature fuse-links
FOREWORD
1) The formal decisions or agreements of the I EC on technical matters, prepared by Technical Committees on which all the National
Committees having a special interest therein are represented, express, as nearly as possible, an inte rnational consensus of opinion
on the subjects dealt with.
2) They have the form of recommendations for inte rnational use and they are accepted by the National Committees in that
sense.
3) In order to promote inte rnational unification, the IEC expresses the wish that all National Committees should adopt the text of
the I EC recommendation for their national rules in so far as national conditions will permit. Any divergence between the I EC
recommendation and the corresponding national rules should, as far as possible, be clearly indicated in the latter.
PREFACE
This standard has been prepared by Sub-Committee 32C: Miniature Fuses, of I EC Technical Com-
mittee No. 32: Fuses.
The text of this standard is based upon the following documents:
Six Months' Rule Report on Voting
32C(CO)49 32C(CO)58
Full information on the voting for the approval of this standard can be found in the Voting Repo rt
indicated in the above table.
The following IEC publications are quoted in this standard:
Publications Nos. 68-2-20 (1979): Basic Environmental Testing Procedures, Pa rt 2: Tests — Test T: Soldering.
68-2-21 (1983): Test U: Robustness of Terminations and Integral Mounting Devices.
695: Fire Hazard Testing.
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SIST EN 60127-3:1999
127-3(2)©IEC — 7
MINIATURE FUSES
Part 3: Sub-miniature fuse-links
INTRODUCTION
The users of miniature fuses express the wish that all standards, recommendations and other docu-
ments relating to miniature fuses should have the same publication number in order to facilitate reference
to fuses in other specifications, e.g. equipment specifications.
Furthermore a single publication number and subdivision into pa rts would facilitate the establishment
of new standards, because paragraphs containing general requirements need not be repeated.
The new I EC Publication 127 series is intended to be subdivided as follows:
Publications Nos 127: Miniature fuses (general title)
127-1: Part
1: Definitions for miniatures fuses and general requirements for miniatures fuse-links.
127-2: Part
2: Cartridge fuse-links.
127-3: Part 3: Subminiature fuse-links.
127-4: Part
4: Universal modular fuse-links.
127-5: Part
5: Guidelines for quality assessment of miniature fuse-links.
127-6: Pa
rt 6: Fuse-holders (until now I EC 257).
127-7: (free for further documents).
127-8: (free for further documents).
127-9: Pa
rt 9: Test-holders and test-circuits.
127-10: Part 10: User guide.
The third pa
rt
of this standard covers additional requirements, test equipment and Standard Sheets.
SECTION ONE — ADDITIONAL REQUIREMENTS AND TEST EQUIPMENT
1. Scope
This standard relates to special requirements applicable to sub-miniature fuse-links adapted to
printed circuits and used for the protection of electric appliances, electronic equipment and com-
ponent part
s thereof, normally intended to be used indoors.
It does not apply to sub-miniature fuse-links for appliances intended to be used under special
conditions, such as in a corrosive or explosive atmosphere.
Note. —
Electrical and electronic circuit designers and printed circuit board manufacturers are advised to allow a 10 mm cube
space for all sub-miniature fuse-links.
This standard applies in addition to the requirements of Pa
rt 1.
2. Object
The object of this standard is:
To define special and additional test methods for sub-miniature fuse-links applying in addition to
the requirements of Part 1.
3. Definitions
(see Part 1)
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SIST EN 60127-3:1999
127-3 (2) ©I EC
4. General requirements (see Part 1)
5. Standard ratings (see Part 1)
6. Marking
1 the following criterion is to be
Additionally to the requirements of Clause 6 in Pa rt
observed:
6.4 The values for "d" and "s" are given in the relevant Standard Sheet.
7. General notes on tests
1 the following criteria are to be
Additionally to the requirements of Clause 7 in Part
observed:
7.2.1 The number of sub-miniature fuse-links required in the case of sub-miniature fuse-links in
accordance with Standard Sheets 1 and 2 is 66, of which 12 are kept as spares in case some of the
tests have to be repeated. The number of sub-miniature fuse-links required in the case of sub-
miniature fuse-links in accordance with Standard Sheets 3 and 4 is 51, of which 12 are kept as spares
in case some of the tests have to be repeated.
1, sub-miniature fuse-links shall be
Additionally to the test mentioned in Sub-clause 7.2.1 of Pa rt
taken and shall be tested or inspected in accordance with the following sub-clause:
•
5. Sub-miniature fuse-link terminations (Sub-clause 8.3)
7.3 Fuse-bases for testing
For tests that require a printed wiring board for mounting and connection of the sub-miniature
fuse-link, a standard test board as shown in Figure 1, page 18, shall be used. This standard printed
wiring board shall be mounted on the standard test base of Figure 2, page 19. The base material for
the board shall be phenolic cellulose paper, copperclad, laminated sheet.
The nominal sheet thickness shall be 1.6 mm.
The nominal thickness of the copper layer shall be 0.035 mm.
Metal pa s of the fuse-base shall be made of brass with copper content between 58% and 70%.
rt
Contact parts shall be silver-plated.
When two or more sub-miniature fuse-links are tested in series, the fuse-bases shall be located so
that there will be a spacing of not less than 50 mm between any two sub-miniature fuse-links under
test. The conductor connecting the fuse-bases together and connecting the fuse-bases to the
ammeter and the source of supply shall be insulated copper wire. The length of each conductor shall
be 250 mm and the diameter of the wire shall be approximately 0.64 mm.
ion of
Note. — Fuse-bases for testing having equivalent electrical and thermal properties and providing for quick inse rt
sub-miniature fuse-links are under consideration.
7.4 Schedule for testing sub-miniature fuse-links according to Standard Sheets 1 and 2, Table 1, page 15,
and according to Standard Sheets 3 and 4, Table 2, page 17.
8. Dimensions and construction
Additionally to the requirements of Clause 8 in Part 1 the following criteria are to be
observed:
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SIST EN 60127-3:1999
127-3 (2) © IEC — 1.1 —
8.2 Construction
The sub-miniature fuse-link shall be resistant to heat according to Sub-clause 9.7 of Part 1 and to
fire in accordance with I E C Publication 695.
Compliance is checked by inspection.
This st
andard is based on the assumption that the case of the sub-miniature fuse-link is made of
glass, ceramic or similar non-combustible material. For other material, such as the optional insu-
lating sleeve or epoxy coating or similar material shown on Standard Sheet 2, additional tests are
under consideration.
8.3 Sub-miniature fuse-link terminations
The sub-miniature fuse-link terminations should be firmly attached so that it is not possible to
remove them without damaging the sub-miniature fuse-link.
The samples are pre-conditioned by immersion in water for 24 h at a temperature between 15 °C
and 35 °C.
Terminations shall withstand the mechanical forces likely to be encountered during normal use.
With the sub-miniature fuse-link held in a fixed position, each terminal in turn is subjected at
ambient temperature to the forces laid down in this standard. These forces shall be exerted in the
direction of the axis of the terminal and applied progressively without jerks. Test sample groups
shall be equally divided among the specific termination tests stipulated in the relevant Standard
Sheets.
Present test methods are to be performed in accordance with I EC Publication 68-2-21.
— For the tensile test (Ua l
), the force applied shall be 10 N.
—
For the thrust test (Ua 2), the force applied shall be 2 N.
—
For the bending test (Ub), if applicable, the force applied shall be 5 N and the number of bends
shall be one.
At the conclusion of testing, the sub-miniature fuse-link terminations shall remain firmly
attached and the voltage drop shall not exceed the maximum allowed in the relevant Standard
Sheet.
8.4 Termination configuration
The sub-miniature fuse-link terminations shall be designed to permit easy installation on printed
circuit wiring boards having a grid system of holes located on 2.54 mm centres, or into fuse-bases
having a spacing between the terminations which is compatible with the 2.54 mm grid system.
Note. —
Electrical and electronic circuit designers are advised to note that grid systems for holes located on 2.54 mm centres
may result in spacings between conductive tracks, in some applications, which do not provide sufficient creepage or
clearance for open-circuit conditions. In such circumstances, it may be necessary to modify the land area around the
mounting hole to ensure an acceptable minimum distance between conductive tracks or select a sub-miniature
fuse-link with longer terminations which can be formed to fit into hole spacings offering the necessary degree of
protection.
More details are given in the User Guide (under consideration as Pa rt 10).
9. Electrical requirements
Additionally to the requirements of Clause 9 in Pa rt 1 the following criteria are to be
observed:
9.1 Voltage drop
The use of a high impedance voltmeter is recommended for measuring the voltage drop. Voltage
drop shall be measured at the points marked with U in Figure 1, page 18.
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SIST EN 60127-3:1999
127-3 (2) © I EC — 13 —
Breaking capacity
9.3
9.3.1 Additionally to the requirements of Sub-clause 9.3.1 in Pa rt 1 the following is to be observed:
Typical test circuits for a.c. and d.c. are given in Figure 3, page 20.
When alternating current is stipulated by the relevant Standard Sheets, the circuit power factor
shall be larger than 0.95. To obtain this result, the circuit current shall be adjusted by the use of
resistors with negligible inductance.
9.3.2 In addition to the criteria of failure prescribed in Part 1, in each of the tests, the sub-miniature
fuse-link shall operate satisfactorily without any of the following phenomena:
—
fusing together of the contacts or terminations;
—
illegibility of marking after test;
— piercing of the external surfaces visible to the naked eye.
The following phenomena are neglected:
— black spots on the sub-miniature fuse-link terminations;
— small deformations of the sub-miniature fuse-link terminations;
— cracking of the subminiature fuse-link.
Endurance tests
9.4
9.4.1 Endurance test at normal ambient temperature
Compliance is checked by subjecting the sub-miniature fuse-links to test method A or B as
required in the relevant Standard Sheets.
9.4.2 Test method A
As specified in Part 1, Sub-clause 9.4 a) to d).
9.4.3 Test method B
a) A direct current, specified in the relevant Standard Sheet, is passed through the sub-miniature
fuse-link for a period of 100 h. The current stability during the test shall be maintained within
± 1% of the adjustable value.
b) Finally, the voltage drop across the fuse-link is measured again according to Sub-clause 9.1. The
voltage drop across the fuse-link after the test shall not have increased by more than 10% of th e
value measured before the test. - -
c) After the tests, the marking shall still be legible and soldered joints on end caps etc. shall not
show any appreciable deterioration.
(under consideration)
9.8 Additional tests
Additional tests under consideration including environmental, physical and electrical character-
istics are as follows:
a) Flammability.
b) Solderability (I EC Publication 68-2-20).
c) Resistance to soldering heat.
d) Resistance to solvents.
Dielectric withstand voltage.
e)
Environmental test.
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SIST EN 60127-3:1999
TABLE 1
Testing schedule, Standard Sheets 1 and 2
Sub-miniature fuse-link number
1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64
Sub-
Description
clause
2 5 8 11 14 17 20 23 26 29 32 35 38 41 44 47 50 53 56 59 62 65
6 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66
3 9
9.7 Sub-miniature fuse-link temperature X
X X
9.4 Endurance tests
X
9.2.1 Time/current characteristics at normal 10 In
ambient temperature
4.0 In X
2.75 In X
X
2.0 In
1.0 In X
N
9.3 Breaking capacity
50 A -. X
Rated breaking capacity
• Rated breaking capacity 50 A =— X
n -. X
5 times the rated current 5 I
5 In — X
5 times the rated current
X
10 times the rated current 10 In ,N.,
X
10 times the rated current 10 /n —
n ,. X
50 times the rated current 5b I
50 times the rated current 50 / n — X
250 1 X
250 times the rated current n .■.
250 times the rated current 250 In — X
X X X X X X X X X X
9.3.3 Insulation resistance
8.3 Fuse-link terminations X X
X X X X X X X
8.5 Soldered joints
6.2 Legibility and indelibility of marking X X X X X
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SIST EN 60127-3:1999
TABLE 2
Testing schedule, Standard Sheets 3 and 4
Sub-miniature fuse-link number
4 7
Sub- 1 10 13 16 19 22 25 28 31 34 37 40 43 46 49
Description
clause
2 5 8 11 14 17 20 23 26 29 32 41 44 47
35 38 50
12
3 6 9 15 18 21 24 27 30 33 36 39 42 45 48 51
9.7 Sub-miniature fuse-link temperature X
X X
9.4 Endurance tests
9.2.2 Test at elevated temperature* X
9.2.1 Time/current characteristics at normal 10 In X
ambient temperature
4.0 In X
2.75
In X
2.1 /n
X
9.3 Breaking capacity
Rated breaking capacity 35 A or 10 In X
5 times the rated current 5 /n X
10 times the rated current 10 In X
50 times the rated current 50 /n X
/n
250 times the rated current 250 X
9.3.3 Insulation resistance X X X X X
X X
8.3 Fuse-link terminations
8.5 Soldered joints X X X X X X
X
6.2 Legibility and indelibility of marking X X X X X
* Applicable only when specified in the relevant standard sheet.
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SIST EN 60127-3:1999
— 18 — 127-3 (2) © CEI
4,2
20
1
f
L
lr)
cr5
ne
90
100
Figure IA
QS 1,0
e Rayon
2 Radius
Figure 1B
Note. —
La zone minimale de passage est à l'étude
(applicable lorsque n est inférieur à 2).
On renvoie également à l'alinéa 2 du para-
graphe
8.4.
Minimum land spacing is under considera-
tion (applicable when n is less than 2).
Also, reference is made to Sub-clause 8.4,
paragraph 2.
157/84
Dimensions en millimètres Dimensions in millimetres
O = couche de cuivre O = copper layer
U = connexion pour mesurer la chute de tension
U = connection for voltage drop measurement
e = 2,54 mm e = 2.54 mm
n = 1, 2, 3, 4 ou 5
n = 1, 2, 3, 4 or 5
Note.— Des socles d'essai améliorés sont à l'étude. Note.—
Improved fuse-bases for testing are under
consideration.
FIG. 1.— Carte d'essai
à circuit imprimé normalisée (pour des courants assignés jusqu'à 5 A inclus) (voir
paragraphe 7.3).
Standard printed wiring test board (for rated currents up to 5 A) (see Sub-clause 7.3).
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SIST EN 60127-3:1999
127-3 (2) © IEC — 19 —
^°-
158/84
Dimensions in millimetres
Dimensions en millimètres
A = socle en matériau à faible conductibilité ther- A = base of low heat conducting material, thickness
mique, épaisseur 10 mm 10 mm
B = brass electrodes 10 mm square
B = électrodes en laiton 10 mm au carré
C = élément de remplacement subminiature soudé C = sub-miniature fuse-link soldered in place
sur place
D = vis de fixation = fixing screws
D
E = vis de contact maintenant une cosse à souder E = contact screws holding solder terminal
F = carte à circuit imprimé (voir figure 1) F = printed circuit board (see Figure 1)
G = espace entre le revêtement de l'élément de = space between sub-miniature fuse-link enclo-
G
remplacement subminiature et la carte: 0,5 sure and board equals 0.5 ± 0.25 mm
± 0,25 mm
H = vue du socle avec électrodes en laiton 10 mm H = top view of base with 10 mm square brass
au carré electrodes
imprimée (voir paragraphe 7.3).
FIG. 2. — Socle d'essai normalisé pour carte
Standard test base for printed wiring board (see Sub-clause 7.3).
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SIST EN 60127-3:1999
— 20 — 127-3 (2) © CEI
S—
O
D b
o
—o A
F
159/84
A = connexion amovible établie pour l'étalonnage A = removable link used for calibration
C = contacteur fermant le circuit C = contactor that makes the circuit
D = interrupteur coupant la source d'alimentation D = switch to disconnect the source of supply
F = coupe-circuit soumis à l'essai F = fuse under test
S = source d'alimentation, impédance intérieure à S = source of supply, impedance less than 10% of
10% de l'impédance totale du circuit the total impedance of the circuit
R = résistance en série, ajustée pour obtenir un cou- R = series resistor, adjusted to obtain correct pros-
rant présumé correct pective current
FIG. 3.—
Circuits d'essai utilisés pour l'essai de pouvoir de coupure des éléments de remplacement
subminiatures à
faible pouvoir de coupure (voir paragraphe 9.3).
Typical circuit for breaking capacity tests for low breaking capacity sub-miniature fuse-links
(see Sub-clause 9.3).
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SIST EN 60127-3:1999
127-3 (2) © I EC - 21 -
SECTION DEUX - FEUILLES DE NORMES PARTICULIÈRES
SECTION TWO - STANDARD SHEETS
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SIST EN 60127-3:1999
— 22 — . 127-3 (2) © CEI
— Page blanche —
— Blank page —
---------------------- Page: 20 ----------------------
SIST EN 60127-3:1999
127-3 © IEC — 25 —
Standard
Sub-miniature fuse-links
Sheet
Quick-acting, low breaking capacity
1
Page 1
Dimensions in millimetres
4.3
10 max. ± 0.3
. ► .
,.
_ o
O O —
o
_. v
--ate
Ni
+I N
10
N
0
H
1
160/84
Note. — The length
l of the terminations may be adapted for a lead taping type of packaging.
Rated Maximum voltage Rated Maximum voltage
Rated
Rated
voltage drop
voltage drop
current current
m
(V) m
(V)
315 mA 700
2mA 6000
400 mA 400
5 mA 3 000
400
10 mA 2 200 500 mA
630 mA 400
16 mA 1 500
400
32 mA 1 500 800 mA
1 A 190
50 mA 1 000
125 1.25 A 125 190
63 mA 1 000
190
80 mA 1 000 1.6 A
2 A 190
100 mA 1 000
125 mA 1 000 2.5 A 190
190
160 mA 1 000 3.15 A
4 A 190
200 mA 700
250 mA 700 5 A 190
If intermediate current values are required, they shall be chosen from the R 20 or R 40 series.
Marking
Sub-miniature fuse-links shall be marked with:
a)
rated current
b) rated voltage
c) manufacturer's name or trade mark
Pre-arcing time/current characteristic
The pre-arcing time shall be within the following limits:
In 2 In 2.75 In 4 In 10 In
Rated current
maximum maximum maximum
minimum maximum
4 h 5 s 300 ms 30 ms 4 ms
2 mA to 5 A inclusive
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SIST EN 60127-3:1999
127-3 © IEC
— 26 —
Standard
Sub-miniature fuse-links
Sheet
Quick-acting, low breaking capacity
1
Page 2
Breaking capacity
Rated breaking capacity: 50 A, tested with a.c. and d.c. using the circuit given in Figure 3, page 20, for the breaking capacity
test.
Endurance test
of Sub-clause 9.4.3.
100 h minimum at a continuous current of 0.8 times the rated current, according to test method B
Sub-miniature fuse-link contact test
The contact leads shall be evaluated in accordance with Sub-clause 8.3 for:
a) tensile
b) thrust
c) bending (applicable only if the length of the terminations is over 5 mm)
Sub-miniature fuse-link temperature-rise test.
The initial current according to Sub-clause 9.7 shall be I.
Notes 1. — For design information relative to minimum spacing between conductive tracks, refer to paragraph 2 of Sub-
clause 8.4.
2. —
The maximum operating ambient temperature is +85 T. When the sub-miniature fuse-link is operating under these
conditions the current load should be reduced to 0.9 In.
---------------------- Page: 22 ----------------------
SIST EN 60127-3:1999
29 —
—
127-3 (2) ©
IEC
Standard
Sub-miniature fuse-links
Sheet
Quick-acting, low breaking capacity
2
Page I
Dimensions in millimetres
40 max. 10 max.
40 max.
0 y^
.. ^p
i^^1IIINIII/
-
E
+1 •^
^^
^_ _
s p
c
-
(NI
co
^`^
kiii^^I.
O 1
G
I
1
n
1I
U
n e
161/84
Optional insulating sleeve.
Note. —
Rated Maximum voltage
Rated Maximum voltage
Rated
Rate
voltage drop voltage drop
current current
(V) (V)
mV (mV)
50 mA 2 250 800 mA 275
275
63 mA 2 230 1 A
2 200 1.25 A 275
80 mA
275
100 mA 1 750 1.6 A
2 A 125 250
125 mA 1 500
1 500 2.5 A 250
160 mA
125
250
200 mA 1 500 3.15 A
1 000 4 A 225
250 mA
225
1 000 5 A
315 mA
400 mA 1 000
500 mA 1 000
630 mA 500
If intermediate current values are required, they shall be chosen from the R 20 or R 40 series.
Marking
Sub-miniature fuse-links shall be marked with:
a) rated current
b) manufacturer's name or trade mark
Note. — Where colour bands are used, the values for "s" and "d" shall be 0.4 p I mm
Pre-arcing time/current characteristic
The pre-arcing time shall be within the following limits:
In 2 In 2.75 In 4 In 10 In
Rated current
minimum maximum maximum maximum maximum
50 mA to 5 A inclusive 4 h 5 s 300 ms 30 ms 4 ms
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SIST EN 60127-3:1999
127-3 (2) © IEC
— 30 —
Standard
Sub-miniature fuse-links
Sheet
Quick-acting, low breaking capacity
2
Page 2
Breaking capacity
Rated breaking capacity: 50 A, tested with a.c. and d.c. using the circuit given in Figure 3, page 20, for the breaking capacity
test.
Endurance test
100 h minimum at a continuous current of 0.8 times the rated current, according to test method B of Sub-clause 9.4.3.
Sub-miniature fuse-link contact test
The contact leads shall be evaluated in accordance with Sub-clause 8.3 for:
a) tensile
b) bending
Sub-miniature fuse-link temperature-rise test
The initial current according to Sub-clause 9.7 shall be I.
Note. — The maximum operating ambient temperature is +85 °C. When the sub-miniatu re fuse-link is operating under these
conditions the current load should be reduced to 0.9 In.
---------------------- Page: 24 ----------------------
SIST EN 60127-3:1999
127-3 (2) ©
IEC
— 33 —
Standard
Sub-miniature fuse-links
Sheet
Quick-acting, low breaking capacity
3
Page I
Dimensions in millimetres
10 max.
4.3 ± 0.3
0.5 min.
o
+I
r`
0
co
O O
id
0
N
co
O
1
1
162/84
Note. — The length /
of the terminations may be adapted for a lead taping type of packaging.
Rated Maximum voltage Rated Maximum voltage
Rated
Rated
voltage
drop voltage drop
current current
(V) (mV) (V) (mV)
50 mA
850 800 mA 300
63 mA 750 I A 280
80 mA
650 1.25 A 280
100 mA 600 1.6 A 250
125 mA 550 2 A 250 240
160 mA
500 2.5 A 200
250
200 mA 480 3.15 A 180
250 mA
440 4 A 160
315 mA 400
5 A 150
400 mA 370
500 mA
350
630 mA
320
If intermediate current values are required, they shall be chosen from the R 20 or R 40 series.
Marking
Sub-miniature fuse-links shall be marked with:
a) rated current
b) rated voltage
c) manufacturer's name or trade mark
d) characteristic symbol F
Pre-arcing time/current characteristic
The pre-arcing time shall be within the following limits:
I
4
2.75 In
2.1 In
10 In
Rated current
maximum
maximum
minimum maximum minimum
maximum
50 mA to 5 A inclusive 30 min
10 ms 3 s 3 ms 20 ms
300 ms
---------------------- Page: 25 ----------------------
SIST EN 60127-3:1999
— 34 — 127-3 (2) © IEC
Standard
Sub-miniature fuse-links
Sheet
Quick-acting, low breaking capacity
3
Page 2
Breaking capacity
Rated breaking capacity: 35 A, or 10 I n, whichever is greater, tested with a.c. using the circuit given in Figure 3, page 20, for the
breaking capacity test.
Endurance test
100 cycles at rated current according to test method A of Sub-clause 9.4.2, followed by 1 h at 1.5 times the rated current.
Sub-miniature fuse-link contact test
The contact leads shall be evaluated in accordance with Sub-clause 8.3 for:
a) tensile
b) thrust
c) bending (applicable only if the length of the terminations is over 5 mm)
Sub-miniature fuse-link temperature-rise test
The initial current according to Sub-clause 9.7 shall be 1.5 In.
Note. — The maximum operating ambient temperature is +85 °C.
When the sub-miniature fuse-link is operating under these conditions the current load should be reduced to 0.9 In.
---------------------- Page: 26 ----------------------
SIST EN 60127-3:1999
127-3 (2) © IEC —
37 —
Standard
Sub-miniature fuse-links
Sheet
Time lag, low breaking capacity
4
Page I
Dimensions in millimetres
10 max. 4,3 ± 0,3
0,5 min.
^n ^
+I
O co
o
JI.ci
L
lid
-1-
4110
N
co
O
tS).
—
0
/
162/84
Note. — The length l of the terminations may be adapted for a lead taping type of packaging.
Rated Maximum voltage
Rated Maximum voltage
Rate Rated
voltage drop voltage drop
current curren
(V (mV)
m
(V)
40 mA 600 630 mA 180
160
50 mA 550 800 mA
63 mA 1 A 140
480
130
80 mA 400 1.25 A
1.6 A 250 120
100 mA 350
300 2 A 100
125 mA
250
100
160 mA 280 2.5 A
3.15 A 100
200 mA 260
250 mA 240 4 A 100
315 mA 220
400 mA 200
500 mA 190
If intermediate current values are required, they shall be chosen from the R 20 or R 40 series.
Marking
Sub-miniature fuse-links shall be marked with:
a) rated current
b) rated voltage
c) manufacturer's name or trade mark
d) characteristic symbol T
Pre-arcing time/current characteristic
The pre-arcing time shall be within the following limits:
2.75 In 4 In 10 In
2.1 I
Rated current n
maximum
maximum
minimum maximum minimum maximum minimum
40 mA to 4 A inclusive 2 min 400 ms 10 s 150 ms 3 s 20 ms 150 ms
±
Test at a temperature of 70 2 °C.
A current of 1.0 I n shall be passed through the sub-miniature fuse-links for 1 h and they shall not operate.
---------------------- Page: 27 ----------------------
SIST EN 60127-3:1999
— 38 — 127-3 (2) © IEC
Standard
Sub miniature fuse-links
-
sheet
Time lag, low breaking capacity
4
Page 2
Breaking capacity
Rated breaking capacity: 35 A, or 10 I„ whichever is greater, tested with a.c. using the circuit in Figure 3, page 20, for the breaking
capacity test.
Endurance test
100 cycles at rated current according to test method A of Sub-clause 9.4.2, followed by 1 h at 1.5 times rated current.
Sub-miniature fuse-link contact test
The contact leads shall be evaluated in accordance with Sub-clause 8.3 for:
tensile
a)
b) thrust
c) bending (applicable only if the length of the terminations is over 5 mm)
Sub-miniature fuse-link temperature-rise test
The initial current according to Sub-clause 9.7 shall be 1.5 In.
Note. — The maximum operating ambient temperature is +85 °C.
When the sub-miniature fuse-link is operating under these conditions the current load should be reduced to 0.9 In.
---------------------- Page: 28 -------------------
...
SLOVENSKI STANDARD
SIST EN 60127-3:1999
01-julij-1999
1DGRPHãþD
SIST EN 60127-3:1995
Miniaturne varovalke - 3. del: Subminiaturni taljivi vložki (IEC 60127-
3:1988+A1:1991) (vsebuje popravek AC:1996)
Miniature fuses -- Part 3: Sub-miniature fuse-links
Geräteschutzsicherungen -- Teil 3: Kleinstsicherungseinsätze
Coupe-circuit miniatures -- Partie 3: Eléments de remplacement subminiatures
Ta slovenski standard je istoveten z: EN 60127-3:1996
ICS:
29.120.50 9DURYDONHLQGUXJD Fuses and other overcurrent
PHGWRNRYQD]DãþLWD protection devices
SIST EN 60127-3:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
NORME CEI
INTERNATIONALE IEC
127-3
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
1988
Coupe-circuit miniatures
Troisième partie:
Eléments de remplacement subminiatures
Miniature fuses
Part 3:
Sub-miniature fuse-links
© CEI 1988 Droits de reproduction réservés —
Copyright — all rights reserved
Aucune partie de cette publication ne peut être reproduite ni
No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun pro-
any form or by any means, electronic or mechanical,
cédé, électronique ou mécanique, y compris la photocopie et including photocopying
and microfilm, without permission
les microfilms, sans l'accord écrit de l'éditeur.
in writing from the publisher.
Bu
reau Central de la Commission Electrotechnique Inte rnationale 3, rue de Varembé
Genève, Suisse
Commission Electrotechnique Internationale
CODE PRIX
International Electrotechnical Commission
PRICE CODE
IEC
Mewayaapopttaa 3nelcrporexHu ecaaa HoMUCCHR
• • Pour prix, voir catalogue en vigueur
For price, see current catalogue
---------------------- Page: 2 ----------------------
127-3 (2) © IEC — 3 —
CONTENTS
Page
FOREWORD 5
PREFACE 5
INTRODUCTION 7
SECTION ONE — ADDITIONAL REQUIREMENTS AND TEST EQUIPMENT
Clause
7
1. Scope
7
2. Object
7
3. Definitions
9
4. General requirements
Standard ratings 9
5.
6. Marking 9
7. General notes on tests 9
9
8. Dimensions and construction
11
9. Electrical requirements
TABLE 1 15
TABLE 2 17
FIGURES 18
STANDARD SHEETS
SECTION Two —
Standard Sheet 1 — Sub-miniature fuse-links
Quick-acting, low breaking capacity 25
Standard Sheet 2 — Sub-miniature fuse-links
29
Quick-acting, low breaking capacity
Standard Sheet 3 — Sub-miniature fuse-links
Quick-acting, low breaking capacity 33
Standard Sheet 4 Sub-miniature fuse-links
—
Time lag, low breaking capacity 37
---------------------- Page: 3 ----------------------
127-3 (2) © IEC — 5 —
INTERNATIONAL ELECTROTECHNICAL COMMISSION
MINIATURE FUSES
Part 3: Sub-miniature fuse-links
FOREWORD
1) The formal decisions or agreements of the I EC on technical matters, prepared by Technical Committees on which all the National
Committees having a special interest therein are represented, express, as nearly as possible, an inte rnational consensus of opinion
on the subjects dealt with.
2) They have the form of recommendations for inte rnational use and they are accepted by the National Committees in that
sense.
3) In order to promote inte rnational unification, the IEC expresses the wish that all National Committees should adopt the text of
the I EC recommendation for their national rules in so far as national conditions will permit. Any divergence between the I EC
recommendation and the corresponding national rules should, as far as possible, be clearly indicated in the latter.
PREFACE
This standard has been prepared by Sub-Committee 32C: Miniature Fuses, of I EC Technical Com-
mittee No. 32: Fuses.
The text of this standard is based upon the following documents:
Six Months' Rule Report on Voting
32C(CO)49 32C(CO)58
Full information on the voting for the approval of this standard can be found in the Voting Repo rt
indicated in the above table.
The following IEC publications are quoted in this standard:
Publications Nos. 68-2-20 (1979): Basic Environmental Testing Procedures, Pa rt 2: Tests — Test T: Soldering.
68-2-21 (1983): Test U: Robustness of Terminations and Integral Mounting Devices.
695: Fire Hazard Testing.
---------------------- Page: 4 ----------------------
127-3(2)©IEC — 7
MINIATURE FUSES
Part 3: Sub-miniature fuse-links
INTRODUCTION
The users of miniature fuses express the wish that all standards, recommendations and other docu-
ments relating to miniature fuses should have the same publication number in order to facilitate reference
to fuses in other specifications, e.g. equipment specifications.
Furthermore a single publication number and subdivision into pa rts would facilitate the establishment
of new standards, because paragraphs containing general requirements need not be repeated.
The new I EC Publication 127 series is intended to be subdivided as follows:
Publications Nos 127: Miniature fuses (general title)
127-1: Part
1: Definitions for miniatures fuses and general requirements for miniatures fuse-links.
127-2: Part
2: Cartridge fuse-links.
127-3: Part 3: Subminiature fuse-links.
127-4: Part
4: Universal modular fuse-links.
127-5: Part
5: Guidelines for quality assessment of miniature fuse-links.
127-6: Pa
rt 6: Fuse-holders (until now I EC 257).
127-7: (free for further documents).
127-8: (free for further documents).
127-9: Pa
rt 9: Test-holders and test-circuits.
127-10: Part 10: User guide.
The third pa
rt
of this standard covers additional requirements, test equipment and Standard Sheets.
SECTION ONE — ADDITIONAL REQUIREMENTS AND TEST EQUIPMENT
1. Scope
This standard relates to special requirements applicable to sub-miniature fuse-links adapted to
printed circuits and used for the protection of electric appliances, electronic equipment and com-
ponent part
s thereof, normally intended to be used indoors.
It does not apply to sub-miniature fuse-links for appliances intended to be used under special
conditions, such as in a corrosive or explosive atmosphere.
Note. —
Electrical and electronic circuit designers and printed circuit board manufacturers are advised to allow a 10 mm cube
space for all sub-miniature fuse-links.
This standard applies in addition to the requirements of Pa
rt 1.
2. Object
The object of this standard is:
To define special and additional test methods for sub-miniature fuse-links applying in addition to
the requirements of Part 1.
3. Definitions
(see Part 1)
---------------------- Page: 5 ----------------------
127-3 (2) ©I EC
4. General requirements (see Part 1)
5. Standard ratings (see Part 1)
6. Marking
1 the following criterion is to be
Additionally to the requirements of Clause 6 in Pa rt
observed:
6.4 The values for "d" and "s" are given in the relevant Standard Sheet.
7. General notes on tests
1 the following criteria are to be
Additionally to the requirements of Clause 7 in Part
observed:
7.2.1 The number of sub-miniature fuse-links required in the case of sub-miniature fuse-links in
accordance with Standard Sheets 1 and 2 is 66, of which 12 are kept as spares in case some of the
tests have to be repeated. The number of sub-miniature fuse-links required in the case of sub-
miniature fuse-links in accordance with Standard Sheets 3 and 4 is 51, of which 12 are kept as spares
in case some of the tests have to be repeated.
1, sub-miniature fuse-links shall be
Additionally to the test mentioned in Sub-clause 7.2.1 of Pa rt
taken and shall be tested or inspected in accordance with the following sub-clause:
•
5. Sub-miniature fuse-link terminations (Sub-clause 8.3)
7.3 Fuse-bases for testing
For tests that require a printed wiring board for mounting and connection of the sub-miniature
fuse-link, a standard test board as shown in Figure 1, page 18, shall be used. This standard printed
wiring board shall be mounted on the standard test base of Figure 2, page 19. The base material for
the board shall be phenolic cellulose paper, copperclad, laminated sheet.
The nominal sheet thickness shall be 1.6 mm.
The nominal thickness of the copper layer shall be 0.035 mm.
Metal pa s of the fuse-base shall be made of brass with copper content between 58% and 70%.
rt
Contact parts shall be silver-plated.
When two or more sub-miniature fuse-links are tested in series, the fuse-bases shall be located so
that there will be a spacing of not less than 50 mm between any two sub-miniature fuse-links under
test. The conductor connecting the fuse-bases together and connecting the fuse-bases to the
ammeter and the source of supply shall be insulated copper wire. The length of each conductor shall
be 250 mm and the diameter of the wire shall be approximately 0.64 mm.
ion of
Note. — Fuse-bases for testing having equivalent electrical and thermal properties and providing for quick inse rt
sub-miniature fuse-links are under consideration.
7.4 Schedule for testing sub-miniature fuse-links according to Standard Sheets 1 and 2, Table 1, page 15,
and according to Standard Sheets 3 and 4, Table 2, page 17.
8. Dimensions and construction
Additionally to the requirements of Clause 8 in Part 1 the following criteria are to be
observed:
---------------------- Page: 6 ----------------------
127-3 (2) © IEC — 1.1 —
8.2 Construction
The sub-miniature fuse-link shall be resistant to heat according to Sub-clause 9.7 of Part 1 and to
fire in accordance with I E C Publication 695.
Compliance is checked by inspection.
This st
andard is based on the assumption that the case of the sub-miniature fuse-link is made of
glass, ceramic or similar non-combustible material. For other material, such as the optional insu-
lating sleeve or epoxy coating or similar material shown on Standard Sheet 2, additional tests are
under consideration.
8.3 Sub-miniature fuse-link terminations
The sub-miniature fuse-link terminations should be firmly attached so that it is not possible to
remove them without damaging the sub-miniature fuse-link.
The samples are pre-conditioned by immersion in water for 24 h at a temperature between 15 °C
and 35 °C.
Terminations shall withstand the mechanical forces likely to be encountered during normal use.
With the sub-miniature fuse-link held in a fixed position, each terminal in turn is subjected at
ambient temperature to the forces laid down in this standard. These forces shall be exerted in the
direction of the axis of the terminal and applied progressively without jerks. Test sample groups
shall be equally divided among the specific termination tests stipulated in the relevant Standard
Sheets.
Present test methods are to be performed in accordance with I EC Publication 68-2-21.
— For the tensile test (Ua l
), the force applied shall be 10 N.
—
For the thrust test (Ua 2), the force applied shall be 2 N.
—
For the bending test (Ub), if applicable, the force applied shall be 5 N and the number of bends
shall be one.
At the conclusion of testing, the sub-miniature fuse-link terminations shall remain firmly
attached and the voltage drop shall not exceed the maximum allowed in the relevant Standard
Sheet.
8.4 Termination configuration
The sub-miniature fuse-link terminations shall be designed to permit easy installation on printed
circuit wiring boards having a grid system of holes located on 2.54 mm centres, or into fuse-bases
having a spacing between the terminations which is compatible with the 2.54 mm grid system.
Note. —
Electrical and electronic circuit designers are advised to note that grid systems for holes located on 2.54 mm centres
may result in spacings between conductive tracks, in some applications, which do not provide sufficient creepage or
clearance for open-circuit conditions. In such circumstances, it may be necessary to modify the land area around the
mounting hole to ensure an acceptable minimum distance between conductive tracks or select a sub-miniature
fuse-link with longer terminations which can be formed to fit into hole spacings offering the necessary degree of
protection.
More details are given in the User Guide (under consideration as Pa rt 10).
9. Electrical requirements
Additionally to the requirements of Clause 9 in Pa rt 1 the following criteria are to be
observed:
9.1 Voltage drop
The use of a high impedance voltmeter is recommended for measuring the voltage drop. Voltage
drop shall be measured at the points marked with U in Figure 1, page 18.
---------------------- Page: 7 ----------------------
127-3 (2) © I EC — 13 —
Breaking capacity
9.3
9.3.1 Additionally to the requirements of Sub-clause 9.3.1 in Pa rt 1 the following is to be observed:
Typical test circuits for a.c. and d.c. are given in Figure 3, page 20.
When alternating current is stipulated by the relevant Standard Sheets, the circuit power factor
shall be larger than 0.95. To obtain this result, the circuit current shall be adjusted by the use of
resistors with negligible inductance.
9.3.2 In addition to the criteria of failure prescribed in Part 1, in each of the tests, the sub-miniature
fuse-link shall operate satisfactorily without any of the following phenomena:
—
fusing together of the contacts or terminations;
—
illegibility of marking after test;
— piercing of the external surfaces visible to the naked eye.
The following phenomena are neglected:
— black spots on the sub-miniature fuse-link terminations;
— small deformations of the sub-miniature fuse-link terminations;
— cracking of the subminiature fuse-link.
Endurance tests
9.4
9.4.1 Endurance test at normal ambient temperature
Compliance is checked by subjecting the sub-miniature fuse-links to test method A or B as
required in the relevant Standard Sheets.
9.4.2 Test method A
As specified in Part 1, Sub-clause 9.4 a) to d).
9.4.3 Test method B
a) A direct current, specified in the relevant Standard Sheet, is passed through the sub-miniature
fuse-link for a period of 100 h. The current stability during the test shall be maintained within
± 1% of the adjustable value.
b) Finally, the voltage drop across the fuse-link is measured again according to Sub-clause 9.1. The
voltage drop across the fuse-link after the test shall not have increased by more than 10% of th e
value measured before the test. - -
c) After the tests, the marking shall still be legible and soldered joints on end caps etc. shall not
show any appreciable deterioration.
(under consideration)
9.8 Additional tests
Additional tests under consideration including environmental, physical and electrical character-
istics are as follows:
a) Flammability.
b) Solderability (I EC Publication 68-2-20).
c) Resistance to soldering heat.
d) Resistance to solvents.
Dielectric withstand voltage.
e)
Environmental test.
---------------------- Page: 8 ----------------------
TABLE 1
Testing schedule, Standard Sheets 1 and 2
Sub-miniature fuse-link number
1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64
Sub-
Description
clause
2 5 8 11 14 17 20 23 26 29 32 35 38 41 44 47 50 53 56 59 62 65
6 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66
3 9
9.7 Sub-miniature fuse-link temperature X
X X
9.4 Endurance tests
X
9.2.1 Time/current characteristics at normal 10 In
ambient temperature
4.0 In X
2.75 In X
X
2.0 In
1.0 In X
N
9.3 Breaking capacity
50 A -. X
Rated breaking capacity
• Rated breaking capacity 50 A =— X
n -. X
5 times the rated current 5 I
5 In — X
5 times the rated current
X
10 times the rated current 10 In ,N.,
X
10 times the rated current 10 /n —
n ,. X
50 times the rated current 5b I
50 times the rated current 50 / n — X
250 1 X
250 times the rated current n .■.
250 times the rated current 250 In — X
X X X X X X X X X X
9.3.3 Insulation resistance
8.3 Fuse-link terminations X X
X X X X X X X
8.5 Soldered joints
6.2 Legibility and indelibility of marking X X X X X
---------------------- Page: 9 ----------------------
TABLE 2
Testing schedule, Standard Sheets 3 and 4
Sub-miniature fuse-link number
4 7
Sub- 1 10 13 16 19 22 25 28 31 34 37 40 43 46 49
Description
clause
2 5 8 11 14 17 20 23 26 29 32 41 44 47
35 38 50
12
3 6 9 15 18 21 24 27 30 33 36 39 42 45 48 51
9.7 Sub-miniature fuse-link temperature X
X X
9.4 Endurance tests
9.2.2 Test at elevated temperature* X
9.2.1 Time/current characteristics at normal 10 In X
ambient temperature
4.0 In X
2.75
In X
2.1 /n
X
9.3 Breaking capacity
Rated breaking capacity 35 A or 10 In X
5 times the rated current 5 /n X
10 times the rated current 10 In X
50 times the rated current 50 /n X
/n
250 times the rated current 250 X
9.3.3 Insulation resistance X X X X X
X X
8.3 Fuse-link terminations
8.5 Soldered joints X X X X X X
X
6.2 Legibility and indelibility of marking X X X X X
* Applicable only when specified in the relevant standard sheet.
---------------------- Page: 10 ----------------------
— 18 — 127-3 (2) © CEI
4,2
20
1
f
L
lr)
cr5
ne
90
100
Figure IA
QS 1,0
e Rayon
2 Radius
Figure 1B
Note. —
La zone minimale de passage est à l'étude
(applicable lorsque n est inférieur à 2).
On renvoie également à l'alinéa 2 du para-
graphe
8.4.
Minimum land spacing is under considera-
tion (applicable when n is less than 2).
Also, reference is made to Sub-clause 8.4,
paragraph 2.
157/84
Dimensions en millimètres Dimensions in millimetres
O = couche de cuivre O = copper layer
U = connexion pour mesurer la chute de tension
U = connection for voltage drop measurement
e = 2,54 mm e = 2.54 mm
n = 1, 2, 3, 4 ou 5
n = 1, 2, 3, 4 or 5
Note.— Des socles d'essai améliorés sont à l'étude. Note.—
Improved fuse-bases for testing are under
consideration.
FIG. 1.— Carte d'essai
à circuit imprimé normalisée (pour des courants assignés jusqu'à 5 A inclus) (voir
paragraphe 7.3).
Standard printed wiring test board (for rated currents up to 5 A) (see Sub-clause 7.3).
---------------------- Page: 11 ----------------------
127-3 (2) © IEC — 19 —
^°-
158/84
Dimensions in millimetres
Dimensions en millimètres
A = socle en matériau à faible conductibilité ther- A = base of low heat conducting material, thickness
mique, épaisseur 10 mm 10 mm
B = brass electrodes 10 mm square
B = électrodes en laiton 10 mm au carré
C = élément de remplacement subminiature soudé C = sub-miniature fuse-link soldered in place
sur place
D = vis de fixation = fixing screws
D
E = vis de contact maintenant une cosse à souder E = contact screws holding solder terminal
F = carte à circuit imprimé (voir figure 1) F = printed circuit board (see Figure 1)
G = espace entre le revêtement de l'élément de = space between sub-miniature fuse-link enclo-
G
remplacement subminiature et la carte: 0,5 sure and board equals 0.5 ± 0.25 mm
± 0,25 mm
H = vue du socle avec électrodes en laiton 10 mm H = top view of base with 10 mm square brass
au carré electrodes
imprimée (voir paragraphe 7.3).
FIG. 2. — Socle d'essai normalisé pour carte
Standard test base for printed wiring board (see Sub-clause 7.3).
---------------------- Page: 12 ----------------------
— 20 — 127-3 (2) © CEI
S—
O
D b
o
—o A
F
159/84
A = connexion amovible établie pour l'étalonnage A = removable link used for calibration
C = contacteur fermant le circuit C = contactor that makes the circuit
D = interrupteur coupant la source d'alimentation D = switch to disconnect the source of supply
F = coupe-circuit soumis à l'essai F = fuse under test
S = source d'alimentation, impédance intérieure à S = source of supply, impedance less than 10% of
10% de l'impédance totale du circuit the total impedance of the circuit
R = résistance en série, ajustée pour obtenir un cou- R = series resistor, adjusted to obtain correct pros-
rant présumé correct pective current
FIG. 3.—
Circuits d'essai utilisés pour l'essai de pouvoir de coupure des éléments de remplacement
subminiatures à
faible pouvoir de coupure (voir paragraphe 9.3).
Typical circuit for breaking capacity tests for low breaking capacity sub-miniature fuse-links
(see Sub-clause 9.3).
---------------------- Page: 13 ----------------------
127-3 (2) © I EC - 21 -
SECTION DEUX - FEUILLES DE NORMES PARTICULIÈRES
SECTION TWO - STANDARD SHEETS
---------------------- Page: 14 ----------------------
— 22 — . 127-3 (2) © CEI
— Page blanche —
— Blank page —
---------------------- Page: 15 ----------------------
127-3 © IEC — 25 —
Standard
Sub-miniature fuse-links
Sheet
Quick-acting, low breaking capacity
1
Page 1
Dimensions in millimetres
4.3
10 max. ± 0.3
. ► .
,.
_ o
O O —
o
_. v
--ate
Ni
+I N
10
N
0
H
1
160/84
Note. — The length
l of the terminations may be adapted for a lead taping type of packaging.
Rated Maximum voltage Rated Maximum voltage
Rated
Rated
voltage drop
voltage drop
current current
m
(V) m
(V)
315 mA 700
2mA 6000
400 mA 400
5 mA 3 000
400
10 mA 2 200 500 mA
630 mA 400
16 mA 1 500
400
32 mA 1 500 800 mA
1 A 190
50 mA 1 000
125 1.25 A 125 190
63 mA 1 000
190
80 mA 1 000 1.6 A
2 A 190
100 mA 1 000
125 mA 1 000 2.5 A 190
190
160 mA 1 000 3.15 A
4 A 190
200 mA 700
250 mA 700 5 A 190
If intermediate current values are required, they shall be chosen from the R 20 or R 40 series.
Marking
Sub-miniature fuse-links shall be marked with:
a)
rated current
b) rated voltage
c) manufacturer's name or trade mark
Pre-arcing time/current characteristic
The pre-arcing time shall be within the following limits:
In 2 In 2.75 In 4 In 10 In
Rated current
maximum maximum maximum
minimum maximum
4 h 5 s 300 ms 30 ms 4 ms
2 mA to 5 A inclusive
---------------------- Page: 16 ----------------------
127-3 © IEC
— 26 —
Standard
Sub-miniature fuse-links
Sheet
Quick-acting, low breaking capacity
1
Page 2
Breaking capacity
Rated breaking capacity: 50 A, tested with a.c. and d.c. using the circuit given in Figure 3, page 20, for the breaking capacity
test.
Endurance test
of Sub-clause 9.4.3.
100 h minimum at a continuous current of 0.8 times the rated current, according to test method B
Sub-miniature fuse-link contact test
The contact leads shall be evaluated in accordance with Sub-clause 8.3 for:
a) tensile
b) thrust
c) bending (applicable only if the length of the terminations is over 5 mm)
Sub-miniature fuse-link temperature-rise test.
The initial current according to Sub-clause 9.7 shall be I.
Notes 1. — For design information relative to minimum spacing between conductive tracks, refer to paragraph 2 of Sub-
clause 8.4.
2. —
The maximum operating ambient temperature is +85 T. When the sub-miniature fuse-link is operating under these
conditions the current load should be reduced to 0.9 In.
---------------------- Page: 17 ----------------------
29 —
—
127-3 (2) ©
IEC
Standard
Sub-miniature fuse-links
Sheet
Quick-acting, low breaking capacity
2
Page I
Dimensions in millimetres
40 max. 10 max.
40 max.
0 y^
.. ^p
i^^1IIINIII/
-
E
+1 •^
^^
^_ _
s p
c
-
(NI
co
^`^
kiii^^I.
O 1
G
I
1
n
1I
U
n e
161/84
Optional insulating sleeve.
Note. —
Rated Maximum voltage
Rated Maximum voltage
Rated
Rate
voltage drop voltage drop
current current
(V) (V)
mV (mV)
50 mA 2 250 800 mA 275
275
63 mA 2 230 1 A
2 200 1.25 A 275
80 mA
275
100 mA 1 750 1.6 A
2 A 125 250
125 mA 1 500
1 500 2.5 A 250
160 mA
125
250
200 mA 1 500 3.15 A
1 000 4 A 225
250 mA
225
1 000 5 A
315 mA
400 mA 1 000
500 mA 1 000
630 mA 500
If intermediate current values are required, they shall be chosen from the R 20 or R 40 series.
Marking
Sub-miniature fuse-links shall be marked with:
a) rated current
b) manufacturer's name or trade mark
Note. — Where colour bands are used, the values for "s" and "d" shall be 0.4 p I mm
Pre-arcing time/current characteristic
The pre-arcing time shall be within the following limits:
In 2 In 2.75 In 4 In 10 In
Rated current
minimum maximum maximum maximum maximum
50 mA to 5 A inclusive 4 h 5 s 300 ms 30 ms 4 ms
---------------------- Page: 18 ----------------------
127-3 (2) © IEC
— 30 —
Standard
Sub-miniature fuse-links
Sheet
Quick-acting, low breaking capacity
2
Page 2
Breaking capacity
Rated breaking capacity: 50 A, tested with a.c. and d.c. using the circuit given in Figure 3, page 20, for the breaking capacity
test.
Endurance test
100 h minimum at a continuous current of 0.8 times the rated current, according to test method B of Sub-clause 9.4.3.
Sub-miniature fuse-link contact test
The contact leads shall be evaluated in accordance with Sub-clause 8.3 for:
a) tensile
b) bending
Sub-miniature fuse-link temperature-rise test
The initial current according to Sub-clause 9.7 shall be I.
Note. — The maximum operating ambient temperature is +85 °C. When the sub-miniatu re fuse-link is operating under these
conditions the current load should be reduced to 0.9 In.
---------------------- Page: 19 ----------------------
127-3 (2) ©
IEC
— 33 —
Standard
Sub-miniature fuse-links
Sheet
Quick-acting, low breaking capacity
3
Page I
Dimensions in millimetres
10 max.
4.3 ± 0.3
0.5 min.
o
+I
r`
0
co
O O
id
0
N
co
O
1
1
162/84
Note. — The length /
of the terminations may be adapted for a lead taping type of packaging.
Rated Maximum voltage Rated Maximum voltage
Rated
Rated
voltage
drop voltage drop
current current
(V) (mV) (V) (mV)
50 mA
850 800 mA 300
63 mA 750 I A 280
80 mA
650 1.25 A 280
100 mA 600 1.6 A 250
125 mA 550 2 A 250 240
160 mA
500 2.5 A 200
250
200 mA 480 3.15 A 180
250 mA
440 4 A 160
315 mA 400
5 A 150
400 mA 370
500 mA
350
630 mA
320
If intermediate current values are required, they shall be chosen from the R 20 or R 40 series.
Marking
Sub-miniature fuse-links shall be marked with:
a) rated current
b) rated voltage
c) manufacturer's name or trade mark
d) characteristic symbol F
Pre-arcing time/current characteristic
The pre-arcing time shall be within the following limits:
I
4
2.75 In
2.1 In
10 In
Rated current
maximum
maximum
minimum maximum minimum
maximum
50 mA to 5 A inclusive 30 min
10 ms 3 s 3 ms 20 ms
300 ms
---------------------- Page: 20 ----------------------
— 34 — 127-3 (2) © IEC
Standard
Sub-miniature fuse-links
Sheet
Quick-acting, low breaking capacity
3
Page 2
Breaking capacity
Rated breaking capacity: 35 A, or 10 I n, whichever is greater, tested with a.c. using the circuit given in Figure 3, page 20, for the
breaking capacity test.
Endurance test
100 cycles at rated current according to test method A of Sub-clause 9.4.2, followed by 1 h at 1.5 times the rated current.
Sub-miniature fuse-link contact test
The contact leads shall be evaluated in accordance with Sub-clause 8.3 for:
a) tensile
b) thrust
c) bending (applicable only if the length of the terminations is over 5 mm)
Sub-miniature fuse-link temperature-rise test
The initial current according to Sub-clause 9.7 shall be 1.5 In.
Note. — The maximum operating ambient temperature is +85 °C.
When the sub-miniature fuse-link is operating under these conditions the current load should be reduced to 0.9 In.
---------------------- Page: 21 ----------------------
127-3 (2) © IEC —
37 —
Standard
Sub-miniature fuse-links
Sheet
Time lag, low breaking capacity
4
Page I
Dimensions in millimetres
10 max. 4,3 ± 0,3
0,5 min.
^n ^
+I
O co
o
JI.ci
L
lid
-1-
4110
N
co
O
tS).
—
0
/
162/84
Note. — The length l of the terminations may be adapted for a lead taping type of packaging.
Rated Maximum voltage
Rated Maximum voltage
Rate Rated
voltage drop voltage drop
current curren
(V (mV)
m
(V)
40 mA 600 630 mA 180
160
50 mA 550 800 mA
63 mA 1 A 140
480
130
80 mA 400 1.25 A
1.6 A 250 120
100 mA 350
300 2 A 100
125 mA
250
100
160 mA 280 2.5 A
3.15 A 100
200 mA 260
250 mA 240 4 A 100
315 mA 220
400 mA 200
500 mA 190
If intermediate current values are required, they shall be chosen from the R 20 or R 40 series.
Marking
Sub-miniature fuse-links shall be marked with:
a) rated current
b) rated voltage
c) manufacturer's name or trade mark
d) characteristic symbol T
Pre-arcing time/current characteristic
The pre-arcing time shall be within the following limits:
2.75 In 4 In 10 In
2.1 I
Rated current n
maximum
maximum
minimum maximum minimum maximum minimum
40 mA to 4 A inclusive 2 min 400 ms 10 s 150 ms 3 s 20 ms 150 ms
±
Test at a temperature of 70 2 °C.
A current of 1.0 I n shall be passed through the sub-miniature fuse-links for 1 h and they shall not operate.
---------------------- Page: 22 ----------------------
— 38 — 127-3 (2) © IEC
Standard
Sub miniature fuse-links
-
sheet
Time lag, low breaking capacity
4
Page 2
Breaking capacity
Rated breaking capacity: 35 A, or 10 I„ whichever is greater, tested with a.c. using the circuit in Figure 3, page 20, for the breaking
capacity test.
Endurance test
100 cycles at rated current according to test method A of Sub-clause 9.4.2, followed by 1 h at 1.5 times rated current.
Sub-miniature fuse-link contact test
The contact leads shall be evaluated in accordance with Sub-clause 8.3 for:
tensile
a)
b) thrust
c) bending (applicable only if the length of the terminations is over 5 mm)
Sub-miniature fuse-link temperature-rise test
The initial current according to Sub-clause 9.7 shall be 1.5 In.
Note. — The maximum operating ambient temperature is +85 °C.
When the sub-miniature fuse-link is operating under these conditions the current load should be reduced to 0.9 In.
---------------------- Page: 23 ----------------------
CEI
NORME
INTERNATIONALE IEC
127-3
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
1988
Amendement 1
Amendment 1
1991-11
Amendement 1
Coupe-circuit miniatures
Troisième partie:
Eléments de remplacement subminiatures
Amendment 1
Miniature fuses
Part 3:
Sub-miniature fuse-links
Les feuilles de cet amendement sont à insérer dans la
Publication 127-3 (1988).
The sheets contained in this amendment are to be inserted in
Publication 127-3 (1988).
© CEI 1991 Droits de reproduction réservés — Copyright — all rights reserved
Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembé Genève, Suisse
Commission Electrotechnique Internationale
CODE PRIX
international Electrotechnical Commission
PRICE CODEPRICE CODE
MemcayHapoa+aa 3nearporexrMVecaaa KoMKccx+a
IEC
•
• Pour Nix, voir c
...
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