What it is and what it does
The Siemens SENTRON 3VA1110-6EF32-0HH0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection — the main disconnect and fault interrupter in a distribution panel, motor control center, or switchboard. Rated 100 A continuously at 40 °C ambient, it carries that rating flat through 50 °C, then derates to 98 A at 55 °C and 91 A at 70 °C — so in a hot enclosure or summer peak you still have headroom to the bus rating. Breaking capacity is 220 kA at 240 V, 154 kA at 415 V, and 121 kA at 440 V — those numbers put it in the high-interrupting category for industrial mains, meaning it can clear a bolted fault upstream of a transformer or bus riser without cascading. Rated insulation voltage is 800 V, so it's comfortable on 480/277 V or 600 V systems with margin.
Built-in accessories and wiring
This variant ships with a shunt trip release (STL) for remote tripping and a 2-auxiliary-switch + 1-trip-alarm-switch HQ configuration — enough for status feedback to a PLC or to interlock a downstream contactor. No undervoltage release, no ground-fault monitoring, no communication module — it's a straight line-protection breaker with remote-trip capability. Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that fits most Siemens SENTRON panelboards and third-party enclosures with a 70 mm depth allowance.
Lifecycle and sourcing
Maximum power loss is 25 W — relevant for enclosure thermal calculations if you're packing multiple breakers in a sealed panel. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C.