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. Its interrupting capacity hits 187 kA at 240 V — that's the short-circuit current it can safely clear without welding contacts or rupturing the case, which matters when you're coordinating downstream breakers in a high-fault installation. Rated insulation voltage is 800 V, and the breaker carries a communication function for integration into a monitored network. Power loss maxes at 37.5 W — useful to know for enclosure thermal budgeting.
Breaking capacity across voltages
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.