What this MCCB carries — and what it doesn't
The Siemens 3VA2110-7MS32-0CL0 is a SENTRON molded case circuit breaker, 3-pole, designed for starter protection — meaning it's built to sit ahead of a motor starter, not as a general distribution feeder. The adjustable trip range runs from 300 A minimum to 1500 A maximum, so you're setting the overload and short-circuit thresholds to match the motor full-load amps, not the bus. Continuous current rating holds flat at 100 A all the way from 40 °C to 70 °C — no derating headache in a warm enclosure. Short-circuit breaking capacity is where this thing earns its keep: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. That's a lot of fault current headroom for a 100 A frame — useful when you're coordinating downstream of a large transformer or a high-capacity bus. The undervoltage release (UVR) is built in, so the breaker drops on loss of control voltage, and the auxiliary switch complement includes two auxiliary switches plus a trip alarm and an electrical alarm switch.
Panel fit and integration
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — a standard 3-pole MCCB footprint for the SENTRON 3VA platform. It's a panel-mount device, not DIN-rail, so plan for a mounting plate cutout and bus bar connections. The trip indicator on the front gives a quick visual on whether it's tripped on fault or manually opened.