The Siemens SENTRON 3VA2225-6HN32-0DA0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, with a maximum breaking capacity of 242 kA at 240 V AC. This is a line-protection design, meaning it's intended for feeder or main breaker duty rather than motor protection — no ground-fault monitoring or communication function on this variant. The built-in undervoltage release (UVR) trips the breaker when supply voltage drops, which is useful for preventing automatic restart after a power loss.
Breaking capacity and selectivity
The interrupting rating drops as voltage climbs: 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. That 4.5 kA at 690 V is the weak point — if your panel feeds a 690 V bus with high available fault current, this breaker may not coordinate. The 187 kA at 415 V is strong enough for most industrial LV switchboards, giving good selectivity headroom downstream.
Thermal derating and operating range
Continuous current holds at 250 A from 40 °C up to 50 °C, then derates linearly to 213 A at 70 °C. Ambient operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C. Maximum power loss is 50.5 W — account for that heat in a sealed enclosure. Dimensions are 181 mm high, 105 mm wide, 86 mm deep. The 105 mm width is standard for a 3-pole MCCB in this frame; panel cutouts sized for the 3VA1 series will accept this unit without rewiring.