What the ratings mean for fit
The 3VA2225-7KP32-0JA0 is a Siemens SENTRON molded case circuit breaker (MCCB) rated for 250 A continuous current (Iu) with a 3-pole configuration. Its breaking capacity reaches 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 6.3 kA at 690 V — these are the maximum fault currents it can safely interrupt at each voltage level. The ETU850 electronic trip unit provides adjustable overload and short-circuit protection, plus a communication function for integration into a higher-level monitoring system. A shunt trip release (STL) is built in, allowing remote tripping via a control signal.
Thermal derating and operating range
The breaker carries 250 A continuously up to 50 °C ambient. Above that, it derates linearly: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. Operating ambient range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 48 W. The 86 mm depth, 105 mm width, and 181 mm height fit standard panel layouts — verify gland plate clearance for the 105 mm width when retrofitting into an existing cutout.