It carries a 121 kA interrupting capacity at 240 VAC and 75.6 kA at 415 VAC, with a TM240 thermal-magnetic release that combines a thermal bimetal for overload protection and a magnetic coil for short-circuit response.
The 121 kA at 240 VAC is the headline SCCR figure — enough for high-fault utility feeds in North American panels. At 415 VAC it still holds 75.6 kA, dropping to 52.5 kA at 440 VAC and 11.9 kA at both 500 VAC and 690 VAC. The thermal-magnetic TM240 release coordinates cleanly with downstream miniature breakers in a selective scheme — the magnetic trip is fixed, so verify the instantaneous threshold against the let-through of the downstream devices during coordination study.
Current ratings across temperature
At 55 °C it derates to 49 A, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. Ambient temperature inside the enclosure matters — if the panel runs hot, the continuous current capability drops.
Auxiliary switching and monitoring
The auxiliary switch signals the breaker's open/closed position; the trip alarm switch signals when the breaker has tripped on fault — useful for remote status monitoring in a PLC or SCADA system. It has a trip indicator and no undervoltage release or communication function. Ground-fault monitoring is not included.