What this MCCB carries on the line
The Siemens SENTRON 3VA2225-7HN32-0BH0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, with a maximum interrupting capacity of 330 kA at 240 V AC. That interrupting rating drops to 242 kA at 415 V and 440 V, then to 187 kA at 500 V, and 4.5 kA at 690 V — so the voltage class of your distribution panel dictates the fault current this breaker can clear without upstream coordination issues. It is designed for line protection (not motor or feeder protection with integrated ground fault), and ships with an undervoltage release (UVR) plus two auxiliary switches and one trip alarm switch HQ. The UVR means the breaker trips on loss of control voltage — standard for emergency-stop chains or safety circuits where a voltage-drop must open the main disconnect.
Thermal derating and panel fit
The breaker holds its full 250 A rating up to 50 °C ambient. Above that it derates: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. If your panel runs hot — say a non-ventilated enclosure near a furnace line — you need to account for that 15% drop at the top end. The frame dimensions are 105 mm wide, 181 mm high, and 86 mm deep, which fits standard MCCB panel cutouts; verify the depth against your enclosure gland plate clearance before committing the BOM line. Maximum power loss is 50.5 W at rated load — that's heat that stays inside the enclosure, so factor it into your thermal budget if the panel is densely packed.