250 A MCCB with ETU340 — selectivity and SCCR planning
The Siemens SENTRON 3VA2325-5HK32-0AA0 is a 3-pole molded case circuit breaker rated 250 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling. Breaking capacity runs 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V; the 690 V figure is the one to watch if you are feeding a 690 V drive line — that is a low-fault scenario where the upstream transformer impedance does the heavy lifting.
Dimensions are 248 mm high, 138 mm wide, 110 mm deep — a standard 3-pole MCCB footprint for SENTRON 3VA2 frames.