Its TM210 thermal-magnetic release provides overload and short-circuit protection for cable and busbar feeders. The 80 A rating holds steady from 40 °C through 50 °C, then derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. Breaking capacity drops with voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at 500 V and 690 V.
The 3-pole width (76.2 mm) is standard for a 160 A frame MCCB — fits a typical 3-module cutout in a Siemens SENTRON distribution panel or any DIN-rail adapter plate. Rated insulation voltage 800 V, power loss 19.2 W maximum. That heat must be vented — allow free air circulation around the breaker; do not bury it behind tightly packed wiring ducts.