What this MCCB delivers
The Siemens SENTRON 3VA2325-5HN32-0HA0 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 as the panel warms up. It's a line-protection device (not a motor-protective breaker), so it's sized for feeder or main distribution duty where the load is a busbar or a group of downstream branch circuits. Breaking capacity runs 187 kA at 240 V, dropping to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 7.5 kA at 690 V. That 121 kA at 415 V is the number most plant engineers will check first — it tells you this breaker can clear a bolted fault on a 400 V distribution board without letting the arc sustain. The shunt trip release (STL) is built in — that's the auxiliary release on this variant, letting a remote pushbutton or a safety relay trip the breaker without a manual handle pull. No undervoltage release, no ground-fault monitoring, no auxiliary switch, and no communication module. This is a straightforward main breaker with remote-trip capability, nothing more.
Panel fit and mounting
Footprint is 138 mm wide by 248 mm tall by 110 mm deep — standard 3-pole MCCB envelope for this frame size. The 110 mm depth matters when you're laying out a shallow backpanel enclosure; check that the door clearance and busbar stabs leave room for the shunt trip wiring at the front. No trip indicator on the front face, so a visual walk-by won't tell you if it's tripped on fault versus manually opened. If your maintenance team relies on a red-flag indicator for quick troubleshooting, factor that into the panel labeling or add a remote status contact externally.