IEC 61249-2-43-2016 PDF

Full title and description

Materials for printed boards and other interconnecting structures - Part 2-43: Reinforced base materials clad and unclad - Non‑halogenated epoxide cellulose paper/woven E‑glass reinforced laminate sheets of defined flammability (vertical burning test), copper‑clad for lead‑free assembly.

Abstract

This international standard specifies requirements for non‑halogenated epoxide-based reinforced laminate sheets (cellulose paper core with woven E‑glass outer plies), copper‑clad and intended for lead‑free assembly. It defines construction, electrical and non‑electrical properties, flame performance based on a vertical burning test, minimum glass transition temperature and related quality assurance, marking and ordering information. Typical laminate thicknesses covered are in the range 0.60 mm to 1.70 mm and the glass transition temperature is specified as ≥ 100 °C.

General information

• Status: Published / Current.
• Publication date: 12 May 2016 (Edition 1.0).
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 31.180 — Printed circuits and boards.
• Edition / version: Edition 1.0, 2016.
• Number of pages: 42 pages (IEC publication listing).

Scope

IEC 61249-2-43:2016 covers reinforced base materials — specifically non‑halogenated epoxide cellulose paper core panels with woven E‑glass outer reinforcements — offered as copper‑clad laminates for use in printed boards and other interconnecting structures. The standard applies to single‑ and double‑sided copper‑clad laminates in thicknesses from 0.60 mm to 1.70 mm, requires a minimum glass transition temperature (Tg) of 100 °C, and achieves its defined flammability rating by use of non‑halogenated fire retardants chemically bound into the epoxy matrix. It includes requirements for materials and construction, internal marking, electrical and non‑electrical properties, quality assurance, packaging and ordering information.

Key topics and requirements

• Material construction: cellulose paper core with woven E‑glass outer plies and specified resin system (non‑halogenated epoxide).
• Flammability: defined performance using a vertical burning test; flammability achieved via chemically bound, non‑halogenated flame retardants.
• Thermal properties: minimum glass transition temperature (Tg) of 100 °C for the laminate system.
• Thickness range: copper‑clad laminates specified for 0.60 mm to 1.70 mm nominal thicknesses.
• Electrical and mechanical property classes: specified test methods and minimum performance limits for use in printed‑board manufacture and assembly (including lead‑free soldering requirements).
• Quality assurance and marking: requirements for internal marking, inspection, test reporting, packaging and ordering information to ensure material traceability and conformity.

Typical use and users

Primary users are laminate manufacturers, PCB fabricators, OEMs and design engineers specifying base materials for printed circuit boards, particularly where lead‑free assembly and defined flame performance are required (consumer electronics, industrial controls, telecom and other applications requiring halogen‑free materials with adequate Tg). Procurement and quality teams use the standard to specify ordering classes, tests and marking for supplied laminates.

Related standards

IEC 61249 is a multipart series covering reinforced base materials and conductive foils for printed boards; related parts address other laminate constructions and test methods. National/adopted publications exist (for example EN/BS/UNE/DIN adoptions of EN 61249-2-43:2016). The standard also references relevant test-method standards for electrical and material tests used in printed‑board qualification.

Keywords

PCB laminate, non‑halogenated epoxide, cellulose paper core, E‑glass, copper‑clad laminate, lead‑free assembly, flame retardant, Tg ≥100 °C, vertical burning test, printed boards.

FAQ

Q: What is this standard?

A: IEC 61249-2-43:2016 is an international standard that specifies requirements for non‑halogenated epoxide cellulose paper / woven E‑glass reinforced laminate sheets (copper‑clad) with defined flammability and thermal properties for use in printed boards.

Q: What does it cover?

A: It covers material construction, resin system requirements, electrical and non‑electrical properties, flammability (vertical burning) performance, Tg requirements, quality assurance, marking, packaging and ordering information for copper‑clad laminates intended for lead‑free assembly.

Q: Who typically uses it?

A: Laminate and prepreg manufacturers, PCB fabricators, OEM design and materials engineers, procurement and quality assurance teams who specify or verify base materials for printed‑circuit manufacturing and lead‑free assembly.

Q: Is it current or superseded?

A: As published by IEC on 12 May 2016 (Edition 1.0) the document is shown as the current edition; IEC lists the publication and stability information for the 2016 edition. Users should confirm status with national bodies or IEC if in doubt before purchase or formal specification.

Q: Is it part of a series?

A: Yes — IEC 61249 is a multipart series covering materials for printed boards and interconnecting structures; Part 2‑43 is one specific construction/type within that broader family of documents.

Q: What are the key keywords?

A: Non‑halogenated epoxide, cellulose paper core, E‑glass, copper‑clad laminate, lead‑free assembly, flammability (vertical burning), glass transition temperature (Tg).