Current stage: 50.00 Effective date: Oct 6, 2026
Next stage: CFDIS Next stage date: Dec 29, 2026
Originator: IEC
Owner: TC 21/SC 21A
Type: International Standard
ICS: 29.220.30
PUBLISHED IEC 61951-1:2017 ED4
PUBLISHED IEC 61951-1:2017/AMD1:2023 ED4
IN_DEVELOPMENT IEC 61951-1 ED5 50.00 Final text received or FDIS registered for formal approval Oct 6, 2026