The undervoltage release (UVR) built into this variant drops the breaker when supply voltage falls below a set threshold, which is useful for preventing motor re-acceleration after a brownout or for safety interlocking.
This breaker's interrupting rating is voltage-dependent, and the spread matters for selectivity studies. At 240 VAC it clears 121 kA — enough for most secondary distribution near a large transformer. At 415 VAC it's 75.6 kA, at 440 VAC 52.5 kA, and at 500 VAC and 690 VAC it holds at 11.9 kA.
Above that it drops: 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, 45 A at 70 °C. Dimensions are 130 mm tall, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that fits most Siemens SENTRON panelboards and third-party enclosures with DIN-rail or screw-mount adapters.