What this breaker is and what the ratings mean
The Siemens 3VA1110-6MH36-0HH0 is a 3-pole IEC frame 160 molded-case circuit breaker rated 100 A continuous, with a breaking capacity of 70 kA at 415 V AC (class H). That 70 kA Icu means it can safely interrupt a fault current up to that level without welding its contacts or rupturing the case — a spec that governs the available fault current at the panelboard where it's installed. The thermal-magnetic trip unit is a TM120M, set for starter protection: the thermal element tracks motor heating, and the magnetic instantaneous pickup is adjustable from 5 to 15 times In (500 A to 1500 A), letting you coordinate with the motor's inrush without nuisance tripping.
Deployment context and integration
This breaker is sized for a motor branch circuit on a 415 V three-phase supply, typically inside a motor control center or a distribution panel. The clamp connection accepts copper or aluminum conductors without lug kits, saving panel space and a wiring step. The shunt trip (STL) operates on 12–30 V DC or 24 V AC 50/60 Hz — a remote-trip coil for emergency-stop or fire-alarm integration, wired through a normally open contact that energizes the coil to trip. Two auxiliary switches (HQ) and one trip alarm switch (HQ) provide status feedback to a PLC or annunciator panel.