SIST EN 140401-803:2008/A3:2017

Detail specification: Fixed low power film SMD resistors - Cylindrical - Stability classes 0,05; 0,1; 0,25; 0,5; 1; 2

Amendment of the detail specification, aiming to amend the ordering information for a proper discrimination between two different permissible product variants.

Bauartspezifikation: SMD Schicht-Festwiderstände niedriger Belastbarkeit - Zylindrisch - Stabilitätsklassen 0,05; 0,1; 0,25; 0,5; 1; 2

Spécification particulière: Résistances couche fixes à faible dissipation CMS - Cylindriques - Classes de stabilité 0,05; 0,1; 0,25; 0,5; 1; 2

Podrobna specifikacija: Fiksni folijski upori majhnih moči za površinsko montažo - Valjasti - Razredi stabilnosti 0,05; 0,1; 0,25; 0,5; 1; 2 - Dopolnilo A3

General Information

• Status: Published
• Publication Date: 30-Mar-2017
• ICS: 31.040.10 - Fixed resistors
• Technical Committee: I11 - Imaginarni 11
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 22-Mar-2017
• Due Date: 27-May-2017
• Completion Date: 31-Mar-2017
• Ref Project: EN 140401-803:2007/A3:2017 - Detail specification: Fixed low power film SMD resistors - Cylindrical - Stability classes 0,05; 0,1; 0,25; 0,5; 1; 2

Relations

• Amends: SIST EN 140401-803:2008 - Detail specification: Fixed low power film SMD resistors - Cylindrical - Stability classes 0,05; 0,1; 0,25; 0,5; 1; 2
• Effective Date: 07-Feb-2017
• Revised: SIST EN 140401-803:2008 - Detail specification: Fixed low power film SMD resistors - Cylindrical - Stability classes 0,05; 0,1; 0,25; 0,5; 1; 2
• Effective Date: 10-Nov-2015

Overview

The SIST EN 140401-803:2008/A3:2017 is a European standard amendment specifying detailed requirements for fixed low power film SMD resistors, focusing on cylindrical types with various stability classes (0.05, 0.1, 0.25, 0.5, 1, and 2). This amendment, published by CLC (European Committee for Electrotechnical Standardization), updates ordering information, test conditions, and soldering compatibility to differentiate between two permissible product variants: resistors with lead-free termination plating and special resistors with lead-bearing termination plating.

Key objectives of the amendment include improving clarity in product classification, ensuring compatibility with lead-free and traditional solders, and establishing clear ordering protocols for manufacturers, suppliers, and end users.

Key Topics

• Product Variants:

  • Standard products feature lead-free terminations, typically pure tin plating.
  • Special products utilize lead-bearing termination plating (SnPb), with a lead content not less than 3%.

• Ordering Information Enhancements:

  • Addition of a new suffix to identify special products with lead-bearing terminations.
  • Structured ordering format covering detail specification, assessment level, style, temperature coefficient, resistance rating, tolerance, failure rate level, termination plating type, and packaging.

• Solderability and Compatibility:

  • Standard products with lead-free plating must demonstrate compatibility with lead-free solders (e.g., SnCu, SnCuNi, SnAg, SnAgCu) and traditional SnPb solder.
  • Special products with lead-bearing termination plating are only tested for compatibility with conventional SnPb solder.

• Test Conditions and Schedule:

  • Revision of test protocols distinguishing between standard and special products to assure performance reliability under different manufacturing and application scenarios.

• Stability Classes:
  Resistors covered in this amendment maintain stability classifications at 0.05%, 0.1%, 0.25%, 0.5%, 1%, and 2%, addressing diverse precision and performance requirements.

Applications

• Electronics Manufacturing:
  This standard is essential for manufacturers producing cylindrical fixed low power film SMD resistors, especially those supplying components for high-reliability electronic devices requiring precise resistance stability in various environmental conditions.

• Quality Assurance:
  It guides quality control engineers in ensuring correct product identification, compliance with soldering requirements, and stable electrical performance through rigorous testing tailored to lead-free and lead-bearing resistor types.

• Procurement & Inventory Management:
  Provides clear ordering guidelines that allow purchasers to specify the exact resistor type and termination plating needed, facilitating supply chain accuracy and avoiding mix-ups between lead-free and lead-bearing components.

• Regulatory Compliance:
  Supports conformance with environmental directives and industry standards by clarifying the use of lead-free terminations alongside special lead-bearing products wherever necessary.

Related Standards

• EN 60062: Standard for marking codes on resistors, important for temperature coefficient and resistance value coding referenced in ordering information.

• EN 60115-1: Covers fixed resistors' general requirements including failure rate levels, pertinent for specification of reliability classes within this amendment.

• CENELEC Internal Regulations: Framework for adopting and implementing European standards uniformly across member countries.

• RoHS Compliance Standards: Since this amendment focuses on lead content in terminations and soldering compatibility, related regulations on hazardous substances in electrical equipment are relevant.

---

This amendment to EN 140401-803 enhances handling and clarity of low power SMD resistors in the electronics industry by precisely classifying lead-free and lead-containing product variants, streamlining ordering processes, and ensuring robust testing aligned with current soldering technology trends. It is crucial for manufacturers, quality engineers, and supply chain professionals engaged with cylindrical fixed film resistors in compliance-driven markets.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2017
3RGUREQDVSHFLILNDFLMD)LNVQLIROLMVNLXSRULPDMKQLKPRþL]DSRYUãLQVNRPRQWDåR
9DOMDVWL5D]UHGLVWDELOQRVWL'RSROQLOR$
Detail specification: Fixed low power film SMD resistors - Cylindrical - Stability classes
0,05; 0,1; 0,25; 0,5; 1; 2
Bauartspezifikation: SMD Schicht-Festwiderstände niedriger Belastbarkeit - Zylindrisch -
Stabilitätsklassen 0,05; 0,1; 0,25; 0,5; 1; 2
Spécification particulière: Résistances couche fixes à faible dissipation CMS -
Cylindriques - Classes de stabilité 0,05; 0,1; 0,25; 0,5; 1; 2
Ta slovenski standard je istoveten z: EN 140401-803:2007/A3:2017
ICS:
31.040.10 Fiksni upor Fixed resistors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 140401-803:2007/A3

NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2017
ICS 31.040.10
English Version
Detail specification: Fixed low power film SMD resistors -
Cylindrical - Stability classes 0,05; 0,1; 0,25; 0,5; 1; 2
Spécification particulière: Résistances couche fixes à faible Bauartspezifikation: SMD Schicht-Festwiderstände
dissipation CMS - Cylindriques - Classes de stabilité 0,05; niedriger Belastbarkeit - Zylindrisch - Stabilitätsklassen
0,1; 0,25; 0,5; 1; 2 0,05; 0,1; 0,25; 0,5; 1; 2
This amendment A3 modifies the European Standard EN 140401-803:2007; it was approved by CENELEC on 2017-01-23. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 140401-803:2007/A3:2017 E

Contents Page
European foreword . 3
1 Modification to 1.1 . 4
2 Modification to 1.8.1 . 4
3 Modification to 1.9.4 . 4
4 Modification to 1.10.3 . 5
5 Modification to Annex A . 5

European foreword
This document (EN 140401-803:2007/A3:2017) has been prepared by CLC/TC/40XB "Resistors".
The following dates are fixed:
• latest date by which this document has (dop) 2018-01-23
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2020-01-23
standards conflicting with this
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the
...