The Siemens 3VA2110-5HN32-0AJ0 is a SENTRON molded case circuit breaker (MCCB) with a 1200 A frame, rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It is a 3-pole, line-protection device designed for distribution and feeder circuits in industrial panels. Interrupting capacity is 187 kA at 240 V AC, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — so the breaker can clear high fault currents at common distribution voltages without upstream coordination issues.
The 1200 A frame means the breaker's internal mechanism and contacts are sized for that ultimate current; the installed trip unit is set for 100 A. Interrupting capacity at 240 V (187 kA) covers most industrial service-entrance and feeder applications; at 690 V (3.7 kA) the breaker still clears faults but is best applied where available fault current is lower, such as on the secondary side of a step-down transformer. The auxiliary switch configuration (2 aux + 1 trip alarm) provides three dry contacts for PLC or SCADA inputs — enough for status, trip, and a spare without adding an external auxiliary module.