The SENTRON 3VM1112-3ED42-0AA0 is a 4-pole molded case circuit breaker rated for 125 A continuous current across 40 °C to 50 °C ambient, with a TM210 thermal-magnetic release that handles overload and short-circuit protection in one device. Breaking capacity runs 76 kA at 240 V AC, dropping to 53 kA at 415 V, 32 kA at 440 V, and 12 kA at 500 V — match the available fault current at your service voltage to confirm adequate SCCR headroom.
The 125 A rating holds flat to 50 °C; above that it derates to 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. Dimensions are 101.6 mm wide, 130 mm tall, and 70 mm deep — a 4-pole MCCB that fits standard distribution panel gutters.