The Siemens 3VA2110-5MN36-0AJ0 is a SENTRON molded case circuit breaker (MCCB) rated 100 A continuous, with 3 poles, designed specifically for motor protection. It carries a breaking capacity of 187 kA at 240 V AC, 121 kA at 415/440 V, and 75.6 kA at 500 V — numbers that tell you it handles high-fault industrial service, not just branch-circuit backup. Phase failure detection is built in, so it will trip on a lost phase before the motor single-phases and burns.
Panel fit: 105 mm wide, 181 mm tall, 86 mm deep. Three-pole MCCB with 2 auxiliary switches + 1 trip alarm switch HP — that gives you two N.O./N.C. aux contacts and one independent alarm contact for remote trip indication. The base switch is 3VA21105MN360AA0. No undervoltage release, no ground-fault module, no communication function — this is a straight motor-protection breaker with phase-failure detection and adjustable trip settings (4 to 17 s minimum to maximum,).
Thermal derating: the 100 A rating holds flat from 40 °C up to 70 °C (–) — no need to downrate for a warm panel. Ambient operating range is -25 to 70 °C; storage from -40 to 80 °C. Maximum power loss is 10 W.