What this 3VA1110-6MH32-0KC0 is and what it does
The Siemens 3VA1110-6MH32-0KC0 is a SENTRON molded case circuit breaker (MCCB) configured as a starter protection version — meaning it's designed to sit ahead of a motor contactor, providing both short-circuit and overload protection in a single device. It carries 100 A continuously at 40 °C with no derating up to 50 °C, then drops to 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C, so the thermal curve is flat across typical panel ambient temperatures. The interrupting ratings are substantial: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 7.5 kA at both 500 V and 690 V — that 220 kA figure at 240 V means it can handle high-fault utility feeds without cascading upstream. The overcurrent release is the TM120M type, a thermal-magnetic unit with a 120 A frame and the 100 A continuous setting. It ships with the basic switch 3VA11106MH320AA0 and includes 2 auxiliary switches HQ (high-quantity) for status feedback to a PLC or safety relay.
Sizing and deployment context
This MCCB mounts on a DIN rail or panel-mount base — the 70 mm depth, 76.2 mm width, and 130 mm height fit standard SENTRON 3VA1 footprint, so it drops into existing 3VA panel layouts without re-drilling. Rated insulation voltage is 800 V, giving headroom for 690 V systems. Maximum power loss is 25 W, which matters for thermal calculations in sealed enclosures. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. No undervoltage release, no ground-fault monitoring, no phase-failure detection, and no communication function — this is a pure protection device, not a smart breaker. The 3 poles handle three-phase motor circuits; the trip indicator is absent, so a visual flag won't show a tripped state. Voltage trigger is present, which allows remote shunt-trip capability if wired to a control signal.