The Siemens SENTRON 3VA2225-7KP32-0AG0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current and a massive 330 kA breaking capacity at 240 V AC. That interrupting rating means it handles high-fault-current scenarios typical in large distribution panels or industrial mains — it clears a short-circuit fault up to 330 kA without failing, protecting downstream equipment. The 250 A frame is thermally rated at 40 °C ambient, and the breaker includes a communication function for integration into a monitored power system.
Breaking capacity and derating
Breaking capacity drops with system voltage: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 4.5 kA at 690 V. The 690 V figure is low — this breaker is not intended for 690 V mains protection. Continuous current derates above 55 °C: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, 200 A at 70 °C. If the panel ambient runs hot, factor that into your load budget.
Auxiliary switch and trip alarm
The breaker ships with one auxiliary switch and one trip alarm switch (HP design) factory-installed. That gives you a remote status contact for open/closed and a separate contact that signals when the breaker trips on fault. No undervoltage release or ground-fault monitoring is included — those are add-on options if needed.
Dimensions and mounting
Dimensions: 181 mm height, 105 mm width, 86 mm depth. The 105 mm width is standard for a 3-pole MCCB in this frame size — fits standard panel cutouts and DIN-rail mounting adapters. Maximum power loss is 48 W at rated current, so account for that heat in the enclosure thermal calculation.