It carries a TM220 thermal-magnetic overcurrent release, so it handles both overload and short-circuit tripping in one package.
Ratings that matter for fit
Continuous current holds 250 A from 40 °C up to 50 °C without derating — at 55 °C it drops to 243.3 A, and at 70 °C it's 223 A. That's a flat thermal curve through the typical panel ambient; you only start losing headroom above 50 °C. Breaking capacity steps down with voltage: 121 kA at 240 V, 76 kA at 415 V, 53 kA at 440 V, and 17 kA at 500 V.
Panel fit and environment
The TM220 release is fixed thermal-magnetic — no electronic adjustment, no trip indicator, no undervoltage release, no communication function. It's a straightforward line-protection breaker: wire it, torque it, and it trips on overcurrent.