It's designed for line protection in distribution panels — the 100 A rating holds from 40 °C up to 50 °C, then derates gradually to 91 A at 70 °C. Interrupting capacity hits 75.6 kA at 240 V and 52.5 kA at 415 V, dropping to 32 kA at 440 V and 11.9 kA at 500 V / 690 V. That's enough headroom for most industrial service-entrance or feeder applications where fault currents are high.
Dimensions are 101.6 mm wide, 130 mm tall, 70 mm deep — a standard 4-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures.