It carries a 250 A continuous rating at ambient temperatures up to 50 °C without derating, then steps down to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C — the thermal curve matters if this breaker sits next to other heat sources in a crowded enclosure. The TM240 overcurrent release is a thermal-magnetic type, meaning it uses a bimetal strip for overload protection and a solenoid for short-circuit response. No ground-fault monitoring, no undervoltage release, no communication function — this is a straight feeder or branch breaker, not a smart device.
Rated breaking capacity varies sharply with system voltage: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V.