The Siemens SENTRON 3VA2025-5KQ32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 25 A continuous current, designed for line protection in distribution panels. Its interrupting capacity reaches 187 kA at 240 V AC, dropping to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V — the high 240 V rating makes it a fit for low-voltage main or feeder breakers where fault current is high. This MCCB carries a communication function and ground-fault monitoring via summation current formation on the L-conductor, so it can report status and leakage to a higher-level system without a separate GFCI module. Rated insulation voltage is 800 V, and the breaker maintains its 25 A rating across the full ambient range from 40 °C to 70 °C — no derating needed in a warm enclosure.
Mounting and panel fit
Dimensions are 105 mm wide, 181 mm tall, and 86 mm deep — a standard SENTRON 3VA frame width that fits the same DIN-rail or screw-mount footprint as other 3-pole units in the series. The 86 mm depth leaves clearance in a 200 mm deep enclosure.