What this breaker carries
The Siemens 3VA1110-6MH32-0BH0 is a 3-pole IEC frame 160 circuit breaker with a 70 kA breaking capacity at 415 V (class H), rated at 100 A. It is configured for starter protection with a TM120M thermal-magnetic release, but note: this variant ships without overload protection — the TM120M provides short-circuit protection only, with an adjustable instantaneous trip setting from 5 to 15 times In. The unit includes an undervoltage release (UVR) at 24 V DC, two auxiliary switches (HQ), and one trip alarm switch (HQ), plus a nut keeper kit for secure mounting.
What the ratings mean for fit
The 70 kA breaking capacity at 415 V (class H) means this breaker safely interrupts fault currents up to that level without cascading upstream — critical for high-fault installations like industrial MCCs or transformer secondaries. The 100 A continuous rating and the TM120M release suit motor starter protection where the upstream breaker provides short-circuit backup and a separate overload relay handles thermal protection. The UVR at 24 V DC allows remote undervoltage tripping, common in safety circuits or emergency-stop chains. Two auxiliary switches and a trip alarm switch give status feedback to a PLC or annunciator panel.
Panel integration notes
Mounts on a standard DIN rail within an enclosure. The nut keeper kit secures the breaker against vibration in mobile or high-shock applications. The UVR coil holds at 24 V DC nominal; verify the control transformer sizing if multiple UVRs are paralleled. Auxiliary switch wiring shares the same terminal compartment — maintain separation between control and power circuits per IEC 60947-1.