The Siemens SENTRON 3VA2325-7KP32-0AA0 is a 3-pole molded case circuit breaker rated for 250 A continuous current and a massive 330 kA breaking capacity at 240 V AC. That interrupting rating drops to 242 kA at 415 V and 440 V, and 187 kA at 500 V — still plenty of headroom for most industrial service-entrance or feeder applications. At 690 V it's still good for 7.5 kA, which covers downstream coordination in a motor control center. This is a line-protection device, meaning it's built for protecting cables and busbars in distribution, not motor overloads. It carries the ETU850 electronic trip unit, which gives you adjustable N-conductor protection from OFF up to 160% of the phase rating, plus communication capability for monitoring and remote trip indication. No undervoltage release or ground-fault monitoring on this variant — that's a clean feeder breaker.
Sizing and thermal performance
The 250 A rating holds flat from 40 °C all the way to 70 °C ambient — no derating curve to chase in a hot panel. That's unusual; most breakers start tapering above 40 °C. If your panel sits near a furnace line or in a foundry mezzanine, this breaker won't force you to oversize the frame just to keep the copper cool. Power dissipation hits 37.5 W maximum. In a packed enclosure with multiple breakers side-by-side, that heat adds up. Account for it in your thermal budget — the IP40 front face is fine for a clean panel, but if you're sealing the enclosure tighter, make sure the internal volume can shed the combined losses.
Panel fit and mounting
The breaker measures 138 mm wide, 248 mm tall, and 110 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON mounting plates and busbar systems. No surprises on a retrofit if you're replacing an older 3VA2 or 3VL frame in the same cutout.