MCCB for line protection — 200 A, 4-pole, TM240 release
The interrupting ratings are 121 kA at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V — figures that govern the available fault current the breaker can safely clear at each voltage level without upstream coordination failure. This breaker is dimensioned at 70 mm deep, 140 mm wide, and 158 mm tall, fitting into standard SENTRON panel cutouts and busbar arrangements. It includes 2 auxiliary switches (HQ type) and a shunt trip (STL) for remote tripping, but has no communication module, undervoltage release, phase failure detection, or ground fault monitoring — it is a straightforward line-protection device, not a multifunction power monitor.
Thermal derating and ambient limits
Above that, derating begins: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C.
Coordination and selectivity note
For selectivity studies, the TM240 release is a fixed thermal-magnetic design — no electronic adjustment. The 100% N-conductor protection rating means the neutral pole is fully rated, not derated. The latching endurance is 15,000 operations, adequate for distribution duty but not for frequent switching.