The Siemens 3VA2010-8HM46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current across a 4-pole configuration, designed specifically for line protection. Its 330 kA breaking capacity at 415 V AC means it can safely interrupt very high fault currents typical in industrial distribution — enough to handle most secondary-side transformer faults without cascading upstream. The 800 V rated insulation voltage gives headroom for 690 V systems common in heavy industrial drives and motor control centers.
Breaking capacity and selectivity
Breaking capacity drops from 440 kA at 240 V to 330 kA at 415 V and 440 V, then to 220 kA at 500 V, and 52.5 kA at 690 V. The 330 kA at 415 V is the figure that governs most European 400 V distribution panels — it's well above typical transformer fault levels (usually 25–50 kA), so this breaker gives substantial selectivity headroom downstream. At 690 V the 52.5 kA still covers most motor-drive branch circuits, but verify against your transformer impedance if feeding a 690 V bus.
Ground-fault monitoring and trip functionality
Ground-fault monitoring uses summation current formation on L + N conductors — it measures vector sum of phase and neutral currents, so it detects leakage to earth without a separate sensor. Trip indicator is absent, and there is no undervoltage release or voltage trigger. The breaker is a straight thermal-magnetic line-protection device with added ground-fault sensing, not a full electronic trip unit. Maximum power loss is 7.7 W at rated load, which matters for ventilation in sealed enclosures.
Mounting and environment
Dimensions are 181 mm high, 140 mm wide, 86 mm deep — a standard 4-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. The 100 A rating holds flat across the entire 40 °C to 70 °C operating range — no derating needed up to 70 °C ambient, which is unusual and useful for hot panel environments or outdoor cabinets in direct sun.