What this MCCB delivers on a feeder
The Siemens SENTRON 3VA2225-5KP32-0HA0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, with a line-protection design that includes an integrated shunt trip release and onboard communication. It carries 187 kA interrupting capacity at 240 VAC — enough to handle high-fault utility feeds in a distribution panel without cascading upstream. The frame holds the full 250 A up to 50 °C; above that, derate to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. That thermal curve means a panel builder can load it at nameplate in most ventilated enclosures, but a sealed cabinet near other heat sources needs a 10–20 % headroom adjustment.
Interrupting capacity across voltage levels
The 3VA2225-5KP32-0HA0 delivers 187 kA at 240 VAC, 121 kA at both 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V. The steep drop at 690 V is typical for a 250 A frame — the arc energy at that voltage exceeds what the internal arc chutes can quench at high current. For 690 V applications with fault currents above 4.5 kA, a current-limiting upstream fuse or a larger-frame MCCB is needed. The 121 kA at 415 V and 440 V covers most European and North American industrial service-entrance requirements without a series rating.
Panel fit and mounting
The 3VA2225-5KP32-0HA0 measures 105 mm wide, 181 mm high, and 86 mm deep. It mounts on a DIN rail or can be bolted directly to a backplate via the frame lugs. The 3-pole footprint matches standard SENTRON 3VA2 panel cutouts; a panel designed for a 250 A frame from another manufacturer may need a different mounting adapter or bus-bar spacing. The shunt trip release occupies the auxiliary slot — no additional auxiliary switch is fitted, so if remote status indication is needed, a separate auxiliary switch module must be ordered.