What this MCCB is and what the ratings mean
The Siemens 3VA2110-5KP32-0HC0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. That flat thermal curve simplifies panel design: you don't have to oversize for a warm enclosure. The 3-pole unit delivers 187 kA breaking capacity at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. Those numbers govern selectivity with downstream breakers; the 187 kA figure at 240 V means it can sit at the service entrance of a high-fault industrial panel without cascading upstream.
Line protection design with communication and shunt trip
This MCCB is configured for line protection — the primary role is feeder and main distribution protection in a panel. It carries a communication function (enabling integration with a BMS or plant SCADA) and a shunt trip (STL) for remote emergency-off or automated load shedding. Two HQ auxiliary switches provide status feedback to the PLC or annunciator. There is no undervoltage release and no ground-fault monitoring on this variant; those are separate order-code options if the application requires them.
Dimensions and panel integration
The breaker measures 86 mm deep, 105 mm wide, and 181 mm high. That 105 mm width is the standard 3-pole MCCB footprint for the SENTRON 3VA2 frame — it fits existing panel cutouts and busbar arrangements sized for that family. The 86 mm depth leaves clearance for rear-connected busbars and wiring troughs in a 200 mm deep enclosure.
Environmental range and power loss
Operating temperature spans -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 10 W — relevant for thermal budgeting inside a sealed or high-density panel. The 100 A continuous rating holds across the entire operating range, so no additional derating curve is needed for elevated ambient conditions.