It carries a TM240 thermal-magnetic overcurrent release, rated 250 A continuous at 40 °C, and holds that rating flat through 50 °C before a gentle derate curve kicks in: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, 223 A at 70 °C. That interrupting capacity is the headline number here — 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V. Those are short-circuit current ratings (SCCR) you can coordinate downstream gear against, which matters when you're feeding a panel full of motor starters or smaller branch breakers.
The 70 mm depth, 105 mm width, and 158 mm height are standard 3VA frame dimensions — it fits the same footprint as other SENTRON 3VA breakers in the 250 A range. Power loss is 57 W maximum at rated load — that's heat that has to leave the enclosure. In a sealed panel with multiple breakers ganged together, that number drives the ventilation or derating calculation.
Integration notes
This is a line-protection breaker, not a motor-protective device — it's designed for feeder duty, not overload protection of a specific motor. The basic switch part number is 3VA12256EF320AA0 — that's the internal switching mechanism, not something you'd order separately unless you're rebuilding a damaged unit.