Siemens 3RV2742-5ED10 Circuit Breaker

Siemens Sirius 3RV2742-5ED10 is a size S3 circuit breaker designed for plant protection and system protection in control panels, conforming to UL 489 and CSA C22.2 No. 5 approvals. It delivers a main-tripping current of 30 A, with a short-circuit release (N‑trigger) rated at 390 A, and it uses screw-terminal connections while including an integrated auxiliary switch. Its electrical specs include a typical power loss of about 12 W, an insulation voltage of 1000 V, a pollution degree 3 rating, and surge voltage withstand of 8 kV; in networks with a grounded star point between the main and auxiliary circuits, it supports up to 400 V. It is part of the SIRIUS 3RV2 family and is intended for reliable system protection in industrial applications, offering recognized UL/CSA approvals and compact mounting within panels.