Breaking capacity runs from 121 kA at 240 V down to 11.9 kA at 690 V — high enough for most secondary distribution and large motor branch circuits where fault current is substantial. The 70 mm depth and 140 mm width fit standard SENTRON panel cutouts; verify the 158 mm height against your enclosure depth before committing the gland plate.
These are Icu (ultimate breaking capacity) values; the MCCB is rated to interrupt once at these levels and remain functional afterward.
Thermal derating — the real continuous current in a warm panel
Rated 250 A continuous up to 50 °C ambient. Above that the TM240 release derates linearly: 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C.
What's on the nameplate — traceability checkpoints
Brand SENTRON, product designation molded case circuit breaker, version line protection. Four poles, 250 A continuous, rated insulation voltage 800 V. Undervoltage release is built in; no auxiliary contacts, no communication module, no ground fault monitoring, no voltage trigger, no phase failure detection.