The headline number here is the interrupting capacity: 187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 440 V. The 32 A rating holds flat from 40 °C to 50 °C; above that it derates gradually to 28.8 A at 70 °C, so if this breaker lives in a hot enclosure you need to account for the thermal curve.
Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall — a standard SENTRON 3VA frame size that bolts directly into the same footprint as other 3VA1-series breakers. The front face carries an IP40 protection class, fine for a closed panel; no washdown rating here. A shunt trip release (STL) is integrated — order code 3VA9688-0BL32 for the trip coil itself.