The Siemens SENTRON 3VA2110-5HM46-0AA0 is a 4-pole molded case circuit breaker rated for 100 A continuous current with zero derating all the way up to 70 °C — so it holds its full 100 A in a warm enclosure without needing to oversize the frame. Breaking capacity runs 187 kA at 240 VAC, 121 kA at 415/440 VAC, 75.6 kA at 500 VAC, and 3.7 kA at 690 VAC, which covers most industrial service-entrance and feeder applications.
Ground-fault and protection design
This MCCB includes ground-fault monitoring via summation current formation on the L + N conductors — it measures the vector sum of line and neutral current to detect leakage to ground. The design is line protection, meaning it's set up for feeder and main breaker duty rather than motor or generator protection.
Power loss is 10 W maximum, so heat dissipation in a sealed cabinet is manageable. The 4-pole format (3 phases + neutral) is common for North American 120/208 V or 277/480 V wye systems where the neutral needs overcurrent protection.