The Siemens SENTRON 3VA2225-5JQ32-0AG0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying 250 A continuous current at 40 °C through 50 °C without derating — the full 250 A holds across that band, then steps down to 238 A at 55 °C and 200 A at 70 °C, so the thermal curve matters when the panel ambient runs hot. Breaking capacity is the headline: 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 5.1 kA at 690 V. That 187 kA figure at 240 V means it handles extreme fault currents on low-voltage distribution — useful for high-capacity transformer secondaries or busway taps where available fault current is high. The ETU560 electronic trip unit provides adjustable protection curves, communication capability, and a trip indicator. It ships with one auxiliary switch and one trip alarm switch — enough for remote status without an add-on module.
Integration and Mounting
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — fits standard SENTRON 3VA panel cutouts. Front face carries IP40 protection, suitable for enclosed distribution boards where the door seals the rest. Operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C.