The Siemens 3VM1110-4GE42-0AA0 is a SENTRON 4-pole molded case circuit breaker (MCCB) rated for 100 A continuous at 40 °C, with a TM220 thermal-magnetic overcurrent release and line-protection designation. It carries a 121 kA interrupting capacity at 240 V AC — that figure drops to 76 kA at 415 V and 53 kA at 440 V, so the available fault current at the panelboard determines which voltage rating governs your application. The 800 V rated insulation voltage (Ui) and 690 V rated operational voltage (Ue) confirm it handles standard industrial distribution voltages without derating the insulation system.
Compared to the 3VA1010-2ED32-0AD0, the 3VM1110-4GE42-0AA0 is a different generation of the SENTRON platform. The 3VM series uses a TM220 release versus the 3VA's electronic options, and the 3VM carries a higher interrupting rating at 240 V (121 kA vs the 3VA's typical 65 kA range for similar amp frames). The 3VA series offers modular accessories like communication modules and voltage releases that the 3VM lacks — the 3VM has no communication function and no undervoltage release fitted. If your panel was specified around a 3VA1010, the 3VM1110 will occupy a similar footprint (70 mm deep, 101.6 mm wide, 130 mm tall) but the accessory slots and wiring scheme differ, so verify the termination kit and aux contact compatibility before swapping.
Mounts on a standard DIN rail or panel-mount base — the 70 mm depth and 101.6 mm width fit a typical 4-pole MCCB slot in an enclosure. The TM220 release is fixed thermal-magnetic, so no adjustment dials; trip settings are factory-set. The front face carries IP40 protection, adequate for a dry indoor panel but not washdown zones. No communication module, no voltage trigger, no ground-fault monitoring — it's a straight line-protection breaker. Derate the 100 A rating above 55 °C: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, 91 A at 70 °C. The maximum power loss is 25 W, which matters for enclosure heat rise if you're packing multiple breakers in a small cabinet.