A built-in shunt trip (STL) allows remote tripping from a safety relay or emergency-stop circuit.
The 32 A rating holds flat from 40 °C to 50 °C, then derates to 31 A at 55 °C and 30 A at 70 °C. That means in a hot panel — say a non-climate-controlled enclosure on a plant floor — you still get full current up to 50 °C. Above that, you lose roughly 1 A per 5 °C rise. The 10.6 W maximum power loss is manageable for a 3-pole MCCB this size; it won't cook adjacent wiring if you leave a little air gap between breakers.
Dimensions are 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard MCCB footprint for Siemens SENTRON 3VA frames. It mounts via the screw-on lugs or optional DIN-rail adapter. The shunt trip (STL) is wired separately from the main circuit; it draws no power under normal conditions, only when the trip coil is energized.