As the panel temperature climbs, the breaker derates linearly: 69 A at 45 °C, 68 A at 50 °C, 67 A at 55 °C, 65 A at 60 °C, 64 A at 65 °C, and 63 A at 70 °C. The maximum power loss is 16 W, which helps with thermal budgeting in a sealed panel.
Dimensions: 76.2 mm wide, 129.4 mm high, 75.1 mm deep. That 3-inch width is a standard MCCB footprint — it fits the same DIN-rail or screw-mount pattern as most SENTRON 3VA frames. The front face carries an IP40 protection rating, so it's fine in a typical IP54 or IP65 enclosure as long as the door gasket handles the rest.