What this MCCB carries
The Siemens 3VA1163-5MH36-0JH0 is a 3-pole IEC frame 160 MCCB with a 55 kA breaking capacity at 415 V AC — class M, meaning it handles moderate fault levels typical of industrial distribution and motor branch circuits without needing a current-limiting upstream device. Rated In of 63 A with a TM120M thermal-magnetic release, but configured for starter protection: the thermal overload element is omitted (no overload protection), leaving only the magnetic short-circuit pickup adjustable from 5 to 15× In. That makes it a magnetic-only breaker for motor short-circuit protection where a separate overload relay handles the thermal trip. The shunt trip (STL) operates on 110–127 V DC or AC 50/60 Hz, letting a remote emergency-stop or PLC output drop the breaker without manual intervention. Two auxiliary switches (HQ) and one trip alarm switch (HQ) report contact position and fault state back to the control system — useful for a panel where the breaker is not within line of sight. Clamp terminals accept standard copper conductors without lug kits.