Circuit breaker 3VM1 IEC frame 160, 50 A, 25 kA @ 415 V
The Siemens 3VM1150-3GD42-0AA0 is a 4-pole molded case circuit breaker (MCCB) from the 3VM1 series, built on an IEC frame 160 platform. It is configured for line protection with a fixed thermal-magnetic trip unit (TM210, FTFM) rated at 50 A continuous (Ir = 50 A, non-adjustable) and a fixed short-circuit pickup of 10 × In (500 A). The interrupting rating is 25 kA at 415 V AC, breaking capacity class N, which means it can safely clear bolted faults up to that level on a 415 V line without upstream cascading — a key selectivity figure for panel coordination studies. The 100% rated neutral conductor protection and the included nut keeper kit indicate this breaker is intended for panelboard or switchboard mounting where the neutral must be switched and the hardware must stay captive during installation. The product class C designation (made to order, non-returnable) means each unit is manufactured against a specific order — not a stocked shelf item — so lead time and availability are confirmed at quote time, not assumed from a bin count.