Line protection MCCB with undervoltage release
It carries a 187 kA interrupting capacity at 240 VAC, derating to 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V — so the available fault current at the installation point determines which voltage tap you use it on. The thermal curve holds a full 100 A from 40 °C through 50 °C, then steps down: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. The basic switch core is order code 3VA11105EE320AA0, so if you need a replacement internal mechanism that's the sub-assembly to reference.
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that drops into SENTRON distribution boards and most DIN-rail or screw-mount enclosures without re-drilling.