What this MCCB is and what the ratings mean
The SENTRON 3VA2110-7MS32-0BH0 is a 3-pole 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 is unusual; most MCCBs start to derate above 40 °C. Here it means the same 100 A holds even in a hot panel or next to a motor starter. This is the starter protection version (product version field), which means the trip unit is tuned for motor-starting inrush — it tolerates the temporary overload without nuisance tripping, while still clearing a locked-rotor fault. The I-trip is adjustable, so you can dial the magnetic pickup to match the motor's starting profile. Breaking capacity is the headline: 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. At 415 V — the common industrial three-phase voltage — 242 kA means this breaker can interrupt a fault current up to that level without welding contacts or rupturing the case. That puts it in the high-interrupting category, suitable for large transformer-fed switchboards or high-fault panels.
Auxiliaries and undervoltage release
It ships with 2 auxiliary switches plus 1 trip alarm switch (HQ version), giving remote status of the main contacts and the trip event. The undervoltage release (UVR) is built in — if control voltage drops, the breaker opens. That is standard for safety circuits where a loss of control power must disconnect the load.