What this 100 A MCCB does and where it fits
The Siemens SENTRON 3VA2110-7MN32-0AB0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed up to that thermal ceiling. It is designed specifically for motor protection, with built-in phase failure detection and two auxiliary switches HP for status feedback to a PLC or control relay. The interrupting capacity hits 330 kA at 240 V AC, which covers most low-voltage distribution panels and motor control centers where high fault current is a concern. This is a DIN-rail-mount MCCB — 86 mm deep, 105 mm wide, 181 mm tall — sized to fit standard panel layouts. The 10 W maximum power loss means it runs cool enough to group with other breakers without forced ventilation in most enclosures. The supplied basic switch is order code 3VA21107MN320AA0, so replacement of the switching mechanism is a stocked spare option.
What the key ratings mean for your panel
The 100 A rating is flat from 40 °C to 70 °C, so no thermal derating curve to calculate for warm enclosures — just size the feeder for 100 A and the breaker handles it. The interrupting ratings step down with voltage: 330 kA at 240 V, 242 kA at 415/440 V, 187 kA at 500 V, and 3.7 kA at 690 V. At 690 V the 3.7 kA figure is a hard ceiling — verify the available fault current at that voltage before specifying. The 3-pole configuration with phase failure detection catches a lost phase on a motor circuit, which prevents single-phasing damage to the motor windings. The two auxiliary switches HP (high-performance) provide electrical status of the breaker contacts — one normally open, one normally closed — wired back to a PLC digital input or a status lamp on the panel door. No undervoltage release, no ground-fault monitoring, no communication function on this variant; it is a straight motor-protection breaker with local trip indication only (no remote trip flag).