What it is and what it does
The Siemens 3VA2225-7KP32-0CL0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — meaning it sits upstream of a distribution panel or a large load, protecting the cable and bus against overloads and short circuits. It is a 3-pole unit rated for 250 A continuous current at 40 °C, and it carries a breaking capacity of 330 kA at 240 V, 242 kA at 415/440 V, 187 kA at 500 V, and 4.5 kA at 690 V. That spread tells you this breaker is built for high-fault-current installations — think industrial main switchboards or transformer secondaries where available fault current is high. The 250 A rating holds steady up to 50 °C ambient; above that it derates to 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 runs hot you need to account for that curve.
Built-in auxiliaries and releases
This variant comes factory-fitted with an undervoltage release (UVR) — so if the control voltage drops, the breaker trips. That is common in safety circuits or emergency-stop chains where loss of control power should open the main breaker. It also includes a full auxiliary switch complement: 2 auxiliary switches (for status feedback), plus 1 trip alarm switch and 1 electrical alarm switch HQ (high-qualified, meaning higher reliability for signaling). The basic switch supplied is order code 3VA2225-7KP32-0AA0. There is no ground-fault monitoring on this version — if you need GF protection, you would look at a different suffix.
Physical fit and environment
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss at rated current is 50.5 W. Communication function is present, and there is a trip indicator on the front.