Its three-pole design handles line protection in distribution panels, motor control centers, and feeder circuits where high fault current capability is needed. Breaking capacity is the headline here: 220 kA at 240 V AC, 154 kA at 415 V, 121 kA at 440 V, and still 17 kA at 690 V. It's a straightforward, reliable overcurrent protector for standard power distribution.
At 55 °C it derates to 76.8 A, at 60 °C to 75.2 A, at 65 °C to 73.6 A, and at 70 °C to 72 A. Panel builders should account for the derating curve when loading adjacent breakers in a closed enclosure — the 80 A rating is only valid up to 50 °C internal cabinet temperature.
The 76.2 mm width is a standard 3-pole MCCB footprint — three modules at 25.4 mm each — so it fits existing SENTRON or comparable DIN-rail mounting bases. No communication function, no phase failure detection, no ground fault monitoring — this is a basic thermal-magnetic breaker for straightforward line protection.