SENTRON 3VM1110-3GE42-0AA0 — 100 A MCCB for Line Protection
The Siemens 3VM1110-3GE42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for continuous line protection at 100 A across the 40 °C to 50 °C ambient range, with only minor derating above that — 98 A at 55 °C, 96 A at 60 °C, and 91 A at 70 °C. The 4-pole configuration with 100% N-conductor protection makes it a fit for three-phase systems where the neutral needs full-rated overcurrent coverage, not just a reduced cross-section. Breaking capacity is the headline spec here: 76 kA at 240 V AC, 53 kA at 415 V AC, 32 kA at 440 V AC, and 12 kA at 500 V AC. For DC systems, the manufacturer directs to the 3VA MCCB manual for switching capacity values — the rated operational voltage for DC is 500 V. The TM220 thermal-magnetic release handles overload and short-circuit protection without an electronic trip unit, keeping the internal power loss at 25 W maximum.
Panel Integration — Dimensions and Mounting
At 101.6 mm wide, 130 mm tall, and 70 mm deep, the 3VM1110-3GE42-0AA0 fits standard SENTRON MCCB panel cutouts. The IP40 front protection means it is suited for enclosed distribution boards where the front face is behind a door or cover — not for washdown or outdoor exposure without an additional enclosure.
Selectivity and Coordination Considerations
For site electrical engineers planning selective coordination, the 76 kA at 240 V and 53 kA at 415 V breaking capacities provide headroom for high-fault installations. The TM220 release curve is thermal-magnetic, not electronic — so coordination studies should use the manufacturer's published trip curves for the 3VM series, not generic MCCB data. No undervoltage release or shunt trip is integrated on this variant (no voltage trigger, no undervoltage release), so external add-on modules are required if those functions are needed in the circuit.