Current stage: 50.00 Effective date: Sep 24, 2026
Next stage: CFDIS Next stage date: Dec 17, 2026
Originator: IEC
Owner: TC 47
Type: International Standard
ICS: 31.080.99
IN_DEVELOPMENT IEC 63550-3 ED1 50.00 Final text received or FDIS registered for formal approval Sep 24, 2026