It carries a continuous current rating of 125 A at 40 °C, with a TM240 thermal-magnetic overcurrent release — the '240' indicates the fixed thermal trip threshold in amperes, so this unit is sized for 125 A continuous but the release element is calibrated for a 240 A frame. Rated insulation voltage is 800 V, and the breaking capacity varies by system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V.
Thermal derating and operating envelope
Above that, the continuous current must be derated: 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. Maximum power loss is 30.6 W — a relevant figure for enclosure thermal calculations, especially in sealed or high-fill-factor panels where heat buildup accelerates derating.
No communication function or ground-fault monitoring is built in; this is a standalone thermal-magnetic breaker with undervoltage release only.