The Siemens SENTRON 3VA1110-3EF32-0JH0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C, with a TM240 thermal-magnetic overcurrent release. It's built for line protection duty — think feeder circuits, distribution panels, and main switchboard positions where you need a solid interrupting rating and a compact footprint. Breaking capacity runs 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V, so it handles high-fault scenarios without cascading upstream.
What the ratings mean on your panel
The 100 A rating holds flat from 40 °C to 50 °C — no derating needed in a warm enclosure. At 55 °C it drops to 96 A, and at 70 °C it's still good for 90 A. That thermal curve matters when you're stacking breakers in a crowded panel; you can push ambient up to 50 °C without losing headroom. Rated insulation voltage is 800 V, so it's comfortable on 480 V and 600 V class systems with margin. The IP40 front protection keeps dust out of the enclosure face — standard for indoor switchgear. It ships with a shunt trip (STL) auxiliary release and a 2+1 auxiliary contact block (2 aux switches + 1 trip alarm switch). That gives you remote tripping capability and status feedback without adding a separate module.