Rated 100 A continuously at 40 °C ambient, it carries that rating flat through 50 °C, then derates to 98 A at 55 °C and 91 A at 70 °C — so in a hot enclosure or summer peak you still have headroom to the bus rating. Breaking capacity is 220 kA at 240 V, 154 kA at 415 V, and 121 kA at 440 V — those numbers put it in the high-interrupting category for industrial mains, meaning it can clear a bolted fault upstream of a transformer or bus riser without cascading.
Built-in accessories and wiring
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that fits most Siemens SENTRON panelboards and third-party enclosures with a 70 mm depth allowance.
Maximum power loss is 25 W — relevant for enclosure thermal calculations if you're packing multiple breakers in a sealed panel.