MCCB for high-fault panel builds
The Siemens 3VA2225-5HN32-0AG0 is a 3-pole molded case circuit breaker from the SENTRON family, rated for 250 A continuous current (Iu) and carrying a 187 kA breaking capacity at 240 V — that's the short-circuit rating that governs whether this breaker clears a fault without upstream devices needing to coordinate.
The interrupting rating drops as voltage rises: 187 kA at 240 V, 121 kA at both 415 V and 440 V, 79 kA at 500 V, and 5.1 kA at 690 V.
Thermal derating and panel fill
Above that it derates: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, 213 A at 70 °C.
Trip unit and auxiliary contacts
The breaker ships with 1 auxiliary switch and 1 trip alarm switch (HP version) — that's the contact configuration you'll use for remote status indication to a PLC or SCADA. The trip indicator is present, which helps during troubleshooting — you can visually confirm the breaker tripped on fault rather than being manually opened.