What this breaker does on the line
The Siemens 3VA1163-6MH36-0CA0 is a 3-pole IEC frame 160 circuit breaker with a 70 kA breaking capacity at 415 V (class H), rated at 63 A. It is configured for starter protection with a TM120M thermal-magnetic release — meaning the thermal element is sized for motor-starting inrush and the magnetic short-circuit pickup is adjustable from 5 to 15 times In. This breaker does not include overload protection (the TM120M provides only short-circuit protection), so it pairs with a separate overload relay in a motor starter assembly. The built-in undervoltage release (UVR) operates on 120–127 V AC, 50/60 Hz, and will trip the breaker if control voltage drops, which is standard for safety circuits that need to drop out on loss of control power.
Panel integration and wiring
Clamp-type terminals accept copper conductors without lugging — strip length and torque follow the Siemens 3VA1 mounting instructions. The breaker snaps onto DIN rail (EN 60715) and occupies a 3-pole width in the panel. The UVR coil draws continuously when energized; verify the control transformer is sized for the holding current plus any other loads on the same 120 V AC circuit.