What this MCCB is and what it does
The Siemens 3VA2110-5MN32-0HL0 is a SENTRON molded case circuit breaker (MCCB) in a motor protection configuration — three poles, rated continuous current Iu of 100 A, and an ETU350M electronic trip unit. It's built for feeder and motor branch-circuit protection in distribution panels and motor control centers, with a shunt trip release (STL) for remote opening and a full auxiliary contact set: 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch HQ.
Breaking capacity — what the numbers mean for your fault level
This breaker carries 187 kA interrupting capacity at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V. Those are the maximum fault currents it can safely clear at each voltage level — critical for selectivity studies and SCCR compliance. At 415 V, 121 kA covers most industrial service-entrance and sub-distribution fault levels; the 17 kA at 690 V still handles typical motor-circuit faults in 690 V drives.
Thermal derating and ambient range
Rated 100 A continuous from 40 °C through 50 °C. Above that, it derates: 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, 90 A at 70 °C. Operating ambient spans -25 °C to 70 °C; storage range is -40 °C to 80 °C. For a 100 A feeder in a warm enclosure, you lose about 10 % capacity at 70 °C — factor that into your busbar and cable sizing.
Protection and release package
The ETU350M electronic trip unit provides adjustable overload and short-circuit protection plus phase-failure detection. A voltage trigger is present for undervoltage or overvoltage sensing. The shunt trip release (STL) allows remote tripping from a PLC or emergency-stop circuit. No ground-fault monitoring module is integrated — if you need GF protection, that's an external accessory. Maximum power loss is 75 W at rated current.
Panel fit and dimensions
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. It's a standard 3-pole MCCB footprint for DIN-rail or panel-mount installation in distribution boards and motor control centers. The 86 mm depth keeps it within typical enclosure clearances for 100 A class breakers.