The Siemens 3VA1163-6MH32-0KH0 is a 3-pole IEC frame 160 circuit breaker rated 63 A continuous, with a breaking capacity of 70 kA at 415 V AC — class H on the 3VA1 platform. It's configured for motor starter protection (TM120M thermal-magnetic release, AM) providing short-circuit protection only — no overload function in this build, so the motor starter's own overload relay handles that job. The adjustable short-circuit pickup range is 5 to 15 times In (315 A to 945 A).
What's on the breaker
A nut keeper kit is also included — that's the hardware that prevents the mounting nuts from backing off under vibration, a detail that matters on a motor circuit in a pump house or compressor skid.