What this MCCB delivers on the line
The Siemens SENTRON 3VA2225-5HL42-0KA0 is a 4-pole molded case circuit breaker rated for 250 A continuous current, designed for line protection in distribution panels. Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V and 440 V, which gives you headroom for high-fault installations where the available short-circuit current is substantial. The breaker carries a shunt trip release (STL) for remote tripping, but no undervoltage release and no auxiliary switch — so if you need status feedback or UV protection, you'll add those externally. The 4-pole configuration makes it suitable for three-phase plus neutral applications, common in North American and European distribution schemes.
Thermal derating and panel fit
The breaker holds its full 250 A rating up to 50 °C ambient. Above that, it derates linearly: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. If your panel runs hot — say, near a drive cabinet or in a non-climate-controlled enclosure — that 70 °C figure drops you to 213 A, so size the upstream feeder accordingly. Physical footprint: 181 mm tall, 140 mm wide, 86 mm deep. That's a 4-pole frame in a standard MCCB envelope — fits most DIN-rail or panel-mount layouts without surprises. Max power dissipation is 48 W, so factor that into your enclosure thermal budget.
Breaking capacity across voltage levels
This MCCB's interrupting capacity drops as system voltage rises: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V. The steep fall at 690 V means it's not your first choice for 690 V distribution unless the fault current is well below 4.5 kA — verify the available fault current at that voltage before committing the BOM line.