What this MCCB carries — and what it means on the panel
The Siemens SENTRON 3VA2110-5JP32-0BH0 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, which simplifies panel thermal budgeting. Interrupting capacity hits 187 kA at 240 V, drops to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 3.7 kA at 690 V — the high 240 V figure tells you this was sized for a low-voltage main or feeder where fault current is punishing, not a branch circuit. Designed for line protection, with an undervoltage release (UVR) built in and provision for 2 auxiliary switches plus 1 trip alarm switch HQ — so it can signal its state back to a PLC or annunciator without a separate contact block. Communication function is on board, which means this breaker can talk to a higher-level system for metering or remote trip — useful when you're building a smart panel that needs to log events.
Footprint and panel fit
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — the 105 mm width is the standard 3-pole MCCB footprint for this SENTRON frame, so it drops into existing DIN-rail or bolt-on mounting without re-drilling the gland plate. Maximum power loss is 12.5 W — low enough that you don't need forced ventilation in a typical enclosure, but worth checking if you're packing multiple breakers in a sealed box at 70 °C ambient.