It is a 3-pole unit rated 50 A continuously at 40 °C, with a maximum interrupting capacity of 75.6 kA at 240 V and 52.5 kA at 415 V — numbers that tell you it clears high-fault currents without the breaker welding shut or the arc flashing over to adjacent busbars.
Ratings that matter for the panel builder
The thermal-magnetic trip holds 50 A through 50 °C ambient; it starts a gentle derating curve above that — 49 A at 55 °C, 48 A at 60 °C, down to 45 A at 70 °C. Physical footprint is 130 mm high, 76.2 mm wide, 70 mm deep — a compact 3-pole MCCB that fits standard Siemens SENTRON mounting bases.
Interrupting performance across voltages
Breaking capacity varies with system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V.