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IEC 60539-1/AMD1 ED4

Amendment 1 - Directly heated negative temperature coefficient thermistors - Part 1: Generic specification

General information

30.99     Dec 19, 2025

TCDV    Mar 30, 2026

IEC

TC 40

International Standard

31.040.30  

Life cycle

PREVIOUSLY

PUBLISHED
IEC 60539-1:2022 ED4

NOW

IN_DEVELOPMENT
IEC 60539-1/AMD1 ED4
30.99 CD approved for registration as DIS
Dec 19, 2025