It carries an interrupting capacity of 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V — so at lower voltages it handles very high fault currents, while at 690 V the rating drops to 10.5 kA, which still covers most industrial distribution faults upstream of a step-down transformer.
Panel footprint is 76.2 mm wide by 130 mm tall by 70 mm deep — standard for a 3-pole SENTRON 3VA1 frame, so it drops into existing DIN-rail or screw-mount enclosures without re-drilling.
Thermal derating: the breaker carries 20 A continuously up to 50 °C ambient; above that it steps down to 19.2 A at 55 °C, 18.8 A at 60 °C, 18.4 A at 65 °C, and 18 A at 70 °C. If your panel runs hot, size the load at 18 A or less to avoid nuisance tripping. Mechanical endurance is 15,000 operations, which is typical for an MCCB in a distribution board not cycled daily.