Integrator's spec recap
The Siemens 3VA1163-6MH36-0KH0 is a 3-pole IEC frame 160 circuit breaker rated In=63A with a breaking capacity class H of Icu=70kA at 415 V. It is configured for starter protection with a TM120M thermal-magnetic release, but note the description explicitly states it provides short-circuit protection only — no overload protection function is active. The adjustable short-circuit release range is Ii=5...15 x In, giving you 315 A to 945 A instantaneous trip. The unit includes a shunt trip (STL) rated for 220-250 V DC or 208-277 V AC, plus two auxiliary switches HQ and one trip alarm switch HQ. All connections are clamp-type. This variant is designed for motor starter applications where upstream or separate overload relays handle the thermal protection.
Deployment context
As a 3VA1 frame breaker, this unit mounts on a DIN rail or panel-mount base inside a motor control center or distribution board. The 70 kA breaking capacity at 415 V suits it for high-fault-current industrial installations where coordination with downstream starters is required.