What it is and what it does
The Siemens 3VA2225-5HL32-0DA0 is a SENTRON molded case circuit breaker (MCCB) rated for 250 A continuous current across three poles, configured for line protection — meaning it sits at the feeder or main distribution point in a panel, not on a motor branch. The interrupting capacity hits 187 kA at 240 V and still holds 121 kA at 415 V, so it handles high-fault utility feeds without cascading upstream. Rated insulation voltage is 800 V, which covers 480 V and 600 V class systems with margin.
Key ratings and what they mean for fit
The 250 A continuous rating holds flat from 40 °C up to 50 °C — no derating needed in a warm enclosure. At 55 °C it drops to 241 A, at 60 °C to 232 A, and at 70 °C to 213 A. If your panel ambient runs above 50 °C, size the load accordingly. The ETU320 electronic trip unit gives adjustable long-time, short-time, and instantaneous protection; the undervoltage release (UVR) lets a safety circuit or E-stop drop the breaker without a manual trip.
Panel integration notes
Dimensions are 181 mm high, 105 mm wide, 86 mm deep — standard MCCB footprint for a 250 A frame. It mounts on a DIN rail or directly to a backplate via the fixed lugs. The 3-pole design with line-side and load-side terminals accepts copper or aluminum conductors up to the rated cross-section. No auxiliary contacts or communication module are fitted on this variant, but the slot accepts the 3VA9608-0BB25 auxiliary trip accessory if needed later.