The Siemens SENTRON 3VA2110-5HN32-0AD0 is a 3-pole molded case circuit breaker 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 simplifies panel schedules: one breaker covers the distribution bus regardless of enclosure heat rise, as long as you stay under 70 °C ambient. At 690 V the rating drops to 3.7 kA — still adequate for most 690 V motor circuits, but verify against your transformer impedance if you're feeding a high-fault 690 V bus. At 181 mm tall, it occupies the same vertical slot as other 3VA2 frame breakers, so swapping a 100 A unit into an existing SENTRON lineup doesn't require re-drilling the mounting plate.
It's a straight thermal-magnetic breaker for feeder or branch-circuit protection. The auxiliary switch option is factory-fitted as three HQ auxiliary switches.
Dimensional check for panel integration
The 105 mm width fits standard 3-pole MCCB cutouts in SENTRON distribution boards. Height of 181 mm matches the 3VA2 frame family, so a swap from a different 3VA2 rating requires no panel rework.