Its interrupting capacity reaches 121 kA at 240 V AC and 75.6 kA at 415 V AC, which means it can clear high-fault currents on industrial distribution panels without cascading upstream — a key spec for main or feeder breaker duty in 400 V class switchgear. The trip indicator is present, giving a local visual flag on the front face after a fault event.
The 100 A rating holds flat from 40 °C to 50 °C ambient, then derates to 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a 3-pole MCCB footprint that fits standard Siemens SENTRON mounting bases and busbar systems.