What this MCCB delivers for your panel
The Siemens 3VA2225-5KP32-0JL0 is a SENTRON molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, with a 3-pole configuration and an ETU850 electronic trip unit. Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V, so it handles high-fault scenarios common in industrial distribution without cascading upstream. The 800 V rated insulation voltage (Ui) means it's suited for 480 V and 600 V class systems with headroom. Dimensions are 105 mm wide, 181 mm tall, and 86 mm deep — fits standard MCCB panel cutouts. The ETU850 release gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves — programmable via the communication interface. That communication function means it can talk to a higher-level control system for trip data and status, which is useful for coordinated protection schemes or remote monitoring in a plant SCADA setup.
Thermal derating and real-world current
The 250 A rating holds flat from 40 °C to 50 °C. At 55 °C it derates to 238 A, at 60 °C to 225 A, and at 70 °C to 200 A. If your panel ambient runs hot — say near a drive cabinet or transformer — factor that 200 A floor at 70 °C into your load schedule. The maximum power loss is 48 W, which matters for enclosure heat rise calculations.
Auxiliary contacts and trip accessories
This variant ships with 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch (HQ version) —. That gives you remote status for open/closed, tripped, and alarm conditions without adding external relays. It also includes a shunt trip (STL) release for remote opening via a control signal. The integrated auxiliary trip module is order code 3VA9688-0BL32. No undervoltage release or ground-fault monitoring module is fitted.