Siemens 3VA1163-5MH32-0AD0 Circuit Breaker, 63A, 55kA @ 415V

The Siemens 3VA1163-5MH32-0AD0 is a 3-pole IEC molded-case circuit breaker from the 3VA1 series, built on the 160 A frame with breaking capacity class M. Its interrupting rating is 55 kA at 415 V AC — that is the Icu (ultimate breaking capacity) per IEC 60947-2, meaning it can safely clear a fault up to that level once without damage to the breaker. Rated at 63 A (In) and fitted with a TM120M trip unit, this breaker is configured for starter protection — the TM120M provides thermal-magnetic overload and short-circuit protection, with an adjustable short-circuit pickup (Ii) from 5 to 15 times In. Note the description states 'without overload protection short-circuit protection' which indicates the TM120M is set for magnetic-only short-circuit protection; the overload function is not active, so upstream or separate overload relay must handle thermal protection for the motor. The breaker ships with a nut keeper kit and three HQ auxiliary switches (form C contacts) for remote status indication. Mounts on a standard DIN rail or panel-mount base inside the enclosure.