What this MCCB is and where it fits
The Siemens 3VA2110-7MS32-0HA0 is a SENTRON molded case circuit breaker (MCCB) built for starter protection — meaning it's designed to sit ahead of a motor starter and handle the high inrush without nuisance tripping, while still clearing a bolted fault fast. Rated for 100 A continuous current at ambient temperatures from -25 °C to 70 °C without derating, so it holds its full rating across a hot panel or a cold warehouse. Three-pole construction handles three-phase motor loads, and the interrupting ratings climb to 330 kA at 240 V, dropping to 242 kA at 415 V and 440 V, then 187 kA at 500 V, and 3.7 kA at 690 V — know your available fault current at the point of installation.
Key ratings — what they mean for fit
The 100 A continuous rating at 40 °C is the same at 70 °C — no thermal derating curve to worry about in a warm enclosure. Interrupting capacity of 330 kA at 240 V means this breaker can clear a massive fault on a low-voltage distribution bus; at 690 V the same breaker drops to 3.7 kA, so it's not a universal high-voltage device. The adjustable trip range spans 300 A to 1 500 A — set it to match the motor full-load amps plus starting current, not the MCCB's own 100 A frame.
Panel fit and wiring
Dimensions are 86 mm deep, 105 mm wide, and 181 mm tall — fits standard MCCB mounting footprints in most industrial panels. Includes a factory-installed shunt trip (STL) auxiliary release for remote tripping via a control signal — useful for emergency-stop circuits or PLC-driven shutdown sequences. No undervoltage release, no ground-fault monitoring, no communication module on this variant — keep it simple for a motor branch circuit.