At 415 VAC the rating drops to 76 kA, and at 500 VAC to 12 kA, so the voltage at the fault point governs the breaker's ability to interrupt.
Thermal-magnetic release and continuous current
The TM220 overcurrent release combines a thermal element for overload protection and a magnetic element for short-circuit response. Rated 25 A continuous at 40 °C ambient, it holds that rating through 50 °C, then derates to 24 A at 55 °C and 23 A at 70 °C. That thermal curve matters for panels in hot environments — a 25 A breaker in a 65 °C switchroom is effectively a 23 A device.
At 70 mm deep, 76.2 mm wide, and 130 mm tall, the 3-pole breaker occupies a standard MCCB footprint for DIN-rail or panel-mount installation.
