The Siemens SENTRON 3VA2025-7KQ32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 25 A continuous current, with an adjustable thermal-magnetic trip range from 38 A minimum to 300 A maximum — so it covers motor branch circuits and feeder protection where you need to dial in the trip point rather than swap the whole breaker. Breaking capacity is the headline here: 330 kA at 240 V, 242 kA at 415/440 V, 187 kA at 500 V, and 3 kA at 690 V. That 330 kA at 240 V means it can interrupt a massive fault without upstream fuses — useful for high-available-fault-current panels like transformer secondaries or large motor control centers. It carries a communication function and a ground-fault monitoring version with summation current formation on the L-conductor, so it can talk to a BMS or PLC and report trip events or leakage — not just a dumb breaker.
Sizing and thermal performance
The continuous current rating holds steady at 25 A across the full operating temperature range from 40 °C to 70 °C — no derating needed up to that point, which simplifies panel design in warm enclosures. Rated insulation voltage is 800 V. Power loss maxes out at 0.5 W.
Physical fit and mounting
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep. That 105 mm width is a standard 3-pole MCCB footprint — it will drop into most panel layouts designed for a 3-pole SENTRON or equivalent frame without re-drilling the backplate.