Siemens SENTRON 3VA2325-5HN32-0DL0 — 250 A MCCB with Undervoltage Release
Breaking capacity runs 187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 500 V, tapering to 7.5 kA at 690 V. That kind of headroom means it handles high-fault utility feeds or large transformer secondaries without upstream fuses.
That is unusual for an MCCB this size; most lose 10–15 % by 60 °C. The 3 000 A frame means the internal trip mechanism is built for high short-circuit energy, so the breaker stays selective with downstream 100–200 A devices. At 690 V the interrupting rating drops to 7.5 kA, which still covers most 690 V motor circuits with typical transformer impedances.
The auxiliary switch deck (2 aux + 1 trip alarm + 1 electrical alarm) gives you enough dry contacts for remote status, PLC inputs, and a separate trip-indication circuit without adding a side-mount block.