What this MCCB is and where it fits
The Siemens 3VA2225-5HL42-0AC0 is a SENTRON molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, with four poles and a line-protection design. It's built for main or feeder protection in distribution panels, switchboards, and industrial power systems where you need high interrupting capacity — 187 kA at 240 V, 121 kA at 415 V, and still 75.6 kA at 500 V. That SCCR headroom means it handles high-fault utility feeds without cascading upstream, so it's a solid choice for service-entrance or large motor-control-center mains.
Ratings that matter for the BOM line
The 250 A continuous rating holds flat from 40 °C to 50 °C, then derates to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. If your panel ambient runs above 50 °C, that derating curve is what governs the actual load you can protect — not the nameplate number. The interrupting ratings are given at multiple voltages, so you size the breaker to the available fault current at your system voltage, not the highest number on the label.
Panel fit and integration
Dimensions are 140 mm wide, 181 mm high, 86 mm deep — a 4-pole MCCB footprint that fits standard distribution panel mounting. It ships with 2 auxiliary switches (HQ type) installed, which is a common configuration for status feedback to a PLC or annunciator. The basic switch assembly is order code 3VA2225-5HL42-0AA0, so if you're stocking spares, that's the internal mechanism that carries the interrupting ratings.