This is a 3-pole Siemens SENTRON 3VA2025-7HN32-0AA0 molded case circuit breaker (MCCB) with a 25 A continuous current rating and an ETU350 electronic trip unit.
Interrupting capacity and what it means for your panel
At 415 V or 440 V it's still 242 kA, and at 500 V it's 187 kA. Only at 690 V does it drop to 3 kA, so if you're on a 690 V system, this is not your breaker.
Physical fit and mounting
The 3VA2025-7HN32-0AA0 measures 105 mm wide by 181 mm tall by 86 mm deep. It's a standard MCCB footprint for this class, so it swaps into existing SENTRON panelboards or DIN-rail adapters without re-drilling.
Thermal performance and environment
Rated current holds at 25 A across the full ambient temperature range from 40 °C up to 70 °C — no derating needed in a hot panel. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C.
Insulation voltage is rated at 800 V, giving margin above the 600 V class systems this breaker typically serves. Power loss is minimal at 0.5 W maximum, so heat buildup in a dense panel is negligible.