The TM240 release means the thermal element tracks load heating and the magnetic trip snaps at a fixed multiple of 25 A — no electronic adjustment, just reliable bimetal-and-solenoid action. That's the right call for a line-protection MCCB where you want predictable coordination with downstream breakers.
Sizing and thermal derating — the real-world current
At 55 °C it derates to 24 A, at 60 °C to 23.5 A, at 65 °C to 23 A, and at 70 °C to 22.5 A. That's a shallow derating curve — you don't lose much headroom in a hot panel.
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that drops into most DIN-rail or panel-mount assemblies without re-drilling. Endurance rated at 15,000 mechanical operations — that's a solid number for a distribution breaker that sees occasional switching, not daily motor starts.