The Siemens SENTRON 3VA2325-6HN32-0JA0 is a 3-pole molded case circuit breaker rated for 250 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed until you push past 70 °C, which is the operating max. Interrupting capacity is the headline: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 7.5 kA at 690 V.
Panel fit — the 110 mm depth matters
Footprint: 138 mm wide, 248 mm tall, 110 mm deep. Width at 138 mm fits a standard 3-pole MCCB cutout; height at 248 mm means it clears most 300 mm tall enclosures but verify against your backpan layout. This is a line-protection design (not motor-protection curve), so it's intended for feeder and distribution duty. The shunt trip (STL) auxiliary release is built in — that's the entry — meaning you can remote-trip it from an E-stop or safety relay without adding an external undervoltage module. No undervoltage release fitted as standard, so if you need UVR for anti-restart, that's a separate add-on.