What this SENTRON MCCB delivers
The Siemens SENTRON 3VA2325-5JQ42-0AA0 is a 4-pole molded case circuit breaker rated for 250 A continuous current, designed for line protection in distribution panels. Power loss maxes at 37.5 W — useful to know for enclosure thermal budgeting.
At 415 V and 440 V the breaker still clears 121 kA; at 500 V it's 75.6 kA; at 690 V it drops to 7.5 kA. That steep derating above 500 V means this frame is really optimized for 240–480 V systems — common in North American and European industrial distribution.
Thermal performance and ambient derating
The 250 A rating holds flat from 40 °C through 70 °C — no derating needed across the typical panel ambient range. Operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C.