The Siemens 3VA2225-6HL32-0KC0 is a SENTRON molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, with three poles and a line-protection design. It carries a shunt trip (STL) and two HQ auxiliary switches factory-fitted, so the internal release and signal contacts are already configured — no field add-on modules needed for basic trip indication or remote shunt control.
Breaking capacity and selectivity headroom
Breaking capacity is voltage-dependent: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 4.5 kA at 690 V. At the common 415 V industrial level, 187 kA gives substantial SCCR headroom for most distribution panels, meaning this breaker can interrupt fault currents up to that level without upstream fuses or a current-limiting transformer. The steep drop to 4.5 kA at 690 V is typical for a 250 A frame — if your system runs 690 V, verify the available fault current stays under that limit.
Thermal derating and ambient limits
The 250 A rating holds flat from 40 °C through 50 °C. Above that it derates: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. If the panel ambient runs above 50 °C, size the breaker for the derated current, not the nominal 250 A. Operating range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. Maximum power loss is 48 W — account for that in enclosure thermal calculations if the panel is sealed.
Panel fit and dimensions
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep. The 105 mm width is a standard 3-pole MCCB footprint for this frame size — fits Siemens 3VA2 panelboards and most DIN-rail adapters without overhang. Depth of 86 mm leaves clearance for rear-connected busbars or cable lugs in a 200 mm deep enclosure.