The Siemens SENTRON 3VA2125-5JP36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current of 25 A across its full ambient temperature range from 40 °C up to 70 °C — no derating needed in a warm panel, which simplifies panel design when the breaker sits near other heat sources. Its interrupting ratings are the headline: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V.
Its dimensions — 105 mm wide, 181 mm tall, 86 mm deep — mean it occupies a standard 3-pole MCCB footprint, so it drops into an existing SENTRON or 3VA-series panel layout without re-drilling the backplate.