Its TM240 thermal-magnetic trip unit provides fixed overload and short-circuit protection without undervoltage or ground-fault monitoring — a straightforward fit for main or feeder breaker duty where selectivity coordination is the priority.
Interrupting capacity and selectivity headroom
At 240 V the breaker clears 220 kA, dropping to 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V.
The breaker carries 250 A through 50 °C ambient, then derates to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. The 70 mm depth, 140 mm width, and 158 mm height fit standard Siemens SENTRON mounting footprints — verify the existing bus-bar drill pattern if retrofitting into a third-party panel.