What it is and what it does
The Siemens 3VA2225-6HL32-0JC0 is a SENTRON molded case circuit breaker (MCCB) for line protection — the main disconnect and fault interrupter in a distribution panel or motor control center. It's rated 250 A continuous at 40 °C, with a 3-pole configuration and an electronic trip unit ETU320 that provides adjustable overload and short-circuit protection curves. The 242 kA breaking capacity at 240 V means it can safely clear a fault up to that level without upstream fuses or breakers needing to coordinate — that's a serious SCCR number for a 250 A frame.
Key ratings and what they mean for fit
The 250 A rating holds across 40 °C to 50 °C (–), then derates linearly to 213 A at 70 °C — so if your panel ambient runs hot, you'll need to account for that. Breaking capacity drops from 242 kA at 240 V to 187 kA at 415 V and 6 kA at 690 V; the 690 V figure is low, so this breaker is best suited for 240–480 V systems where the high interrupt rating matters. The shunt trip (STL) release allows remote tripping via a control signal — common for emergency-stop circuits or undervoltage protection schemes. Two HQ auxiliary switches provide status feedback to a PLC or annunciator panel.
Panel integration and mounting
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — fits standard 3VA2 panel cutouts and busbar systems. The 3-pole frame mounts via screw terminals or plug-in base; no DIN-rail mounting on this class. Plan for 48 W maximum power loss in the enclosure thermal budget.