Rated 125 A continuous at 40 °C (derates to 114 A at 70 °C), it carries a 3-pole configuration and a TM120M thermal-magnetic release that combines a thermal bimetal for overload protection with a magnetic coil for short-circuit response. The interrupting capacity is a heavy 220 kA at 240 V, stepping down to 154 kA at 415 V, 75.6 kA at 440 V, and 7.5 kA at both 500 V and 690 V — so it can handle high-fault scenarios common in industrial distribution.
The 125 A rating at 40 °C is the continuous current the breaker can carry without tripping — but if your panel ambient runs hotter (say 60 °C in a crowded enclosure), you need to derate to 120 A, and at 70 °C to 114 A. No electronic adjustment or communication function here — this is a straightforward, field-reliable design. Two HP auxiliary switches are built in, giving you status feedback for PLC inputs or alarm circuits without needing an external accessory.