EN 61086-1:2004

Coatings for loaded printed wire boards (conformal coatings) - Part 1: Definitions, classification and general requirements

Gives the definitions, classification and general requirements for electrical insulating materials suitable for application as coatings for loaded printed wire boards (conformal coatings). This standard excludes requirements for compatibility between such coatings and printed wire boards, this characteristic being evaluated in individual applications. Surface modifiers are not classified as conformal coatings. They only provide a thin film that does not cure and has low mar resistance. They are excluded from this standard. Materials which conform to this standard meet established levels of performance. However, the selection of a material by a user for a specific application should be based on the actual requirements necessary for adequate performance in that application and not based on this standard alone. This edition includes the following significant technical changes from the previous edition: a) a Class 3 material for aerospace applications has been included; b) a new resin type (oligomeric blend material) has been added.

Beschichtungen für bestückte Leiterplatten (conformal coatings) - Teil 1: Begriffe, Einteilung und allgemeine Anforderungen

Revêtements appliqués sur les cartes de câblage imprimées (revêtements enrobants) - Partie 1: Définitions, classification et exigences générales

Donne les définitions, la classification et les exigences générales relatives aux matériaux isolants électriques utilisés comme revêtements appliqués sur les cartes de câblage imprimées (revêtements enrobants). La présente norme ne traite pas des exigences de compatibilité entre de tels revêtements et les cartes de câblage imprimées; cette caractéristique étant évaluée pour chaque application particulière. Les modificateurs de surface ne font pas partie des revêtements enrobants. Ils ne constituent qu'un film fin et fragile qui ne polymérise pas. Ils sont exclus de cette norme. Les matériaux conformes à cette norme satisfont à des niveaux établis de performance. Cependant, il convient que le choix d'un matériau, par un utilisateur, pour une application spécifique, soit fondé sur les exigences réelles nécessaires pour une performance adéquate de cette application, et non fondé sur cette seule norme. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) dans la classification du matériau, une Classe 3 pour des applications aérospatiales a été incluse; b) un nouveau type de résine (matériau composite constitué d'un mélange d'oligomères) a été ajouté.

Prevleke za z elementi opremljene tiskane plošče (standardne prevleke) - 1. del: Definicije, razvrstitev in splošne zahteve (IEC 61086-1:2004)

General Information

• Status: Published
• Publication Date: 21-Apr-2004
• Withdrawal Date: 28-Feb-2007
• ICS: 29.035.20 - Plastics and rubber insulating materials
• Technical Committee: CLC/SR 15 - Insulating materials
• Drafting Committee: IEC/TC 15 - IEC_TC_15
• Parallel Committee: IEC/SC 15C - IEC_SC_15C
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 22-Apr-2004
• Completion Date: 22-Apr-2004
• Ref Project: SIST EN 61086-1:2004 - Coatings for loaded printed wire boards (conformal coatings) -- Part 1: Definitions, classification and general requirements

Relations

• Replaces: EN 61086-1:1994 - Specification for coatings for loaded printed wire boards (conformal coatings) - Part 1: Definitions, classification and general requirements
• Effective Date: 29-Jan-2023

Overview

EN 61086-1:2004 (CLC adoption of IEC 61086-1:2004) defines terms, classification and general requirements for conformal coatings - electrical insulating materials applied to loaded printed wire boards (PWBs) to form a thin protective film. This Part 1 document establishes common vocabulary, a classification code, and basic supply, storage and usability requirements. It is the first of a three‑part series (Parts 2: test methods; Part 3: material specifications).

Key topics and technical requirements

• Definitions: Clear terms for conformal coating, surface modifier, oligomeric, etc. - surface modifiers (thin non‑curing films ~1–2 µm) are explicitly excluded from this standard.
• Classification system: A coded ID combining:
  • Number = performance class (Class 1 General purpose; Class 2 High reliability; Class 3 Aerospace applications - Class 3 was added in this edition)
  • Letters = resin type (Acrylic A; Epoxy EP; Silicone Si; Polyurethane PUR; Oligomeric blend OL - new in this edition; Paraxylylene XY)
  • Suffixes = material variant (Suffix 1 = water‑based; Suffix 2 = solvent‑removable)
  • Example: IEC 61086-1‑PUR‑1,2 = polyurethane, water‑based and solvent‑removable.
• General requirements:
  • Packaging and marking: containers must be sound and marked with the standard number, material code, lot/batch, manufacturer, expiry (final date for use), hazard warnings, and quantity.
  • Storage: products in sealed containers must retain specified properties until the declared final date for use.
  • Pot life: usability after opening/mixing at (23 ± 2) °C and (50 ± 5) % RH must meet supplier‑declared pot life.
• Scope limits: Compatibility between a coating and a specific PWB assembly is not covered and must be evaluated in each application.

Applications and users

• Intended for manufacturers, suppliers and specifiers of conformal coatings used on loaded printed wire boards in electronics industries.
• Practical users include PCB designers, assembly engineers, procurement specialists, quality and reliability engineers, and regulators who need a common classification and minimum supply/storage requirements.
• Useful across sectors requiring PCB protection: consumer electronics, industrial controls, telecommunications, and aerospace (Class 3).

Related standards

• IEC/EN 61086-2 - Methods of tests (detailed test procedures referenced by Part 1)
• IEC/EN 61086-3 - Specifications for individual materials

EN 61086-1:2004 helps standardize terminology, classification and baseline quality controls for conformal coatings but should be used together with Parts 2 and 3 and application‑specific testing to select the right material for reliable PCB protection.

Standards Content (Sample)

SLOVENSKI SIST EN 61086-1:2004

STANDARD
oktober 2004
Prevleke za z elementi opremljene tiskane plošče (standardne prevleke) - 1.
del: Definicije, razvrstitev in splošne zahteve (IEC 61086-1:2004)
Coatings for loaded printed wire boards (conformal coatings) – Part 1: Definitions,
classification and general requirements (IEC 61086-1:2004)
ICS 31.180 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

NORME CEI
INTERNATIONALE IEC
61086-1
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2004-01
Revêtements appliqués sur les cartes
de câblage imprimées (revêtements enrobants) –
Partie 1:
Définitions, classification et exigences générales
Coatings for loaded printed wire boards
(conformal coatings) –
Part 1:
Definitions, classification and general
requirements
 IEC 2004 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 any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
y compris la photocopie et les photocopying and microfilm, without permission in writing from
électronique ou mécanique,
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail]  Web: www.iec.ch
CODE PRIX
G
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

61086-1  IEC:2004 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COATINGS FOR LOADED PRINTED
WIRE BOARDS (CONFORMAL COATINGS) –
Part 1: Definitions, classification and general requirements
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61086-1 has been prepared by subcommittee 15C: Specifications,
of IEC technical committee 15: Insulating materials.
The text of this standard is based on the following documents:
FDIS Report on voting
15C/1544/FDIS 15C/1562/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

61086-1  IEC:2004 – 5 –
This second edition c
...