EN IEC 60947-4-3:2024

IEC 60947-4-3:2020(E) applies to semiconductor controllers and semiconductor contactors for non-motor load intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V AC.It covers their use:– for operations of changing the state of AC electric circuits between the ON-state and the OFF-state;– with or without bypass switching devices;– as controller, for reducing the amplitude of the RMS AC voltage.This third edition cancels and replaces the second edition published in 2014. This edition constitutes a technical revision.This edition includes the following significant technical changes with respect to the previous edition:a) scope exclusions;b) editorial correction of notes and hanging paragraphs;c) safety aspects related to:- general aspects;- limited energy circuits;- electronic circuits;d) mention of dedicated wiring accessories;e) power consumption measurement;f) alignment to IEC 60947-1:2020;g) alignment with IEC 60947-4-2 when appropriate.