It's built for line protection — the kind of duty where you need a rugged breaker that holds up under sustained load and clears faults fast. The interrupting ratings tell the story: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. The TM240 release is a thermal-magnetic design: thermal bimetal for overload protection (inverse time curve), magnetic coil for short-circuit instant trip. No electronic adjustments, no communications module — this is a straight-ahead breaker for fixed-line protection where you don't need remote monitoring or adjustable trip settings.
Thermal derating — what it can really carry
At 55 °C it derates to 76.8 A, at 60 °C to 75.2 A, at 65 °C to 73.6 A, and at 70 °C to 72 A. For a 70 °C panel environment, plan for a 72 A load limit.
The trip indicator is present — a visible flag when the breaker has tripped on fault, not just manually switched off.