The Siemens SENTRON 3VA2225-5HN42-0KH0 is a 4-pole molded case circuit breaker rated 250 A continuous at 40 °C through 50 °C, with the ETU350 electronic overcurrent release. That 250 A holds flat across the first 10 °C of ambient rise — at 55 °C it still carries 241 A, and at 70 °C it's 213 A. For a line-up MCCB in a warm enclosure, that thermal curve buys you headroom without oversizing the frame. Interrupting capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V.
Integration into the panel
Dimensions are 181 mm high, 140 mm wide, 86 mm deep — standard SENTRON 3VA2 4-pole frame. The ETU350 release is field-adjustable for long-time, short-time, instantaneous, and ground-fault (though this unit ships without ground-fault monitoring per).