It carries a continuous current rating of 250 A at 40 °C and holds that rating through 50 °C — above that it derates linearly to 213 A at 70 °C, so the thermal curve governs the real-world ampacity in a warm enclosure. The auxiliary release fitted is a shunt trip (STL), which lets a remote signal (emergency stop, fire alarm, PLC output) open the breaker independently of the overcurrent mechanism. That makes this variant a fit for circuits where a controlled remote disconnect is required alongside the thermal-magnetic protection.
The interrupting rating is voltage-dependent: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V.
Depth of 86 mm leaves clearance behind a 200 mm deep enclosure gland plate.