The 3VA1163-5MH32-0CH0 is a Siemens 3VA1 IEC frame 160 molded-case circuit breaker with a 63 A TM120M thermal-magnetic trip unit configured for starter protection — that means it provides short-circuit protection only, with no overload protection built in, relying on an upstream contactor or overload relay for that function. The adjustable instantaneous trip (Ii) range of 5 to 15 x In lets you dial in the magnetic pickup to coordinate with downstream motor starters or feeder circuits. The integrated undervoltage release (UVR) operates on 120-127 V AC 50/60 Hz, so if the control voltage drops, the breaker trips — a standard requirement for safety circuits that need to drop power on loss of control supply. Two HQ auxiliary switches and one HQ trip alarm switch provide status feedback for the PLC or DCS, letting the control system know whether the breaker is open, closed, or tripped on fault.
Deployment context
The 3-pole configuration suits three-phase motor loads — conveyors, pumps, fans — typical in continuous-process lines.