The Siemens SENTRON 3VA2110-7HK46-0AA0 is a 4-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 the top of that band. That makes it a straight drop-in for a 100 A feeder or main in a panel that runs warm. The interrupting ratings are the headline here: 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. The ETU340 electronic trip unit handles the overcurrent protection. The N-conductor protection is adjustable — OFF, 50%, or 100% — which matters when you're feeding a 4-wire system and need to coordinate the neutral protection with the phase settings.
Sizing and integration
Power loss is 10 W maximum. In a dense panel with multiple breakers side by side, that's modest — no forced cooling required for most layouts, but worth checking the total dissipation if you're stacking a row of these in a sealed enclosure. The 100 A rating holds all the way to 70 °C, so no summer derating curve to calculate.