Its interrupting capacity hits 121 kA at 240 V AC and still delivers 75.6 kA at 415 V — genuine selectivity headroom for a distribution board feeding motor control centers or lighting panels.
At 415 V it still manages 75.6 kA, dropping to 52.5 kA at 440 V and 11.9 kA at 500 V or 690 V — that 11.9 kA floor is still enough for most industrial panel fault levels, but verify your available fault current at the point of installation. Thermal derating is minimal up to 50 °C (still 80 A), then slides to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. That means a panel at 50 °C ambient gets full rating; above that you lose about 1 A per 5 °C.
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a 3-pole MCCB footprint that fits standard Siemens SENTRON mounting plates and panel cutouts. The undervoltage release (UVR) is factory-fitted, so no field wiring of a separate shunt trip module.