The TM220 thermal-magnetic trip unit handles overloads and short circuits without external power — the thermal element tracks load current continuously, and the magnetic element clears bolted faults fast. At 240 V it interrupts 121 kA, dropping to 75.6 kA at 415 V and 52.5 kA at 500 V; at 690 V the rating is 11.9 kA. The 630 A frame carries full current without derating up to 50 °C ambient; above that it steps down to 618 A at 55 °C, 607 A at 60 °C, 595 A at 65 °C, and 583 A at 70 °C, so a panel builder in a hot enclosure needs to account for the thermal curve.
The breaker measures 248 mm high, 184 mm wide, and 110 mm deep. It mounts into a standard panel cutout for 4-pole MCCBs in the 630 A frame class. No undervoltage release or communication module is fitted on this variant, so it is a straightforward thermal-magnetic main breaker without auxiliary trip coils or network connectivity.