What this 250 A MCCB delivers
The Siemens SENTRON 3VA2225-5KP32-0AH0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C through 50 °C, with no derating needed across that band. Above 50 °C it steps down: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C — so if your panel ambient runs hot, that 250 A nameplate drops to 200 A at the top of the operating range. Breaking capacity is 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. That 187 kA at 240 V means it handles very high available fault currents common on industrial secondary substations without cascading upstream.
Panel fit and integration
Dimensions are 181 mm height, 105 mm width, 86 mm depth — a standard MCCB footprint for this current class. The 86 mm depth means it clears most 200 mm deep enclosures with room for rear-access cabling. It carries two auxiliary switches plus one trip alarm switch (HQ design), and includes a communication function for status feedback to a PLC or BMS. The base switch variant is 3VA2225-5KP32-0AA0.