The 4-pole configuration handles three-phase-plus-neutral or three-phase with a switched neutral, common in North American and IEC distribution panels. Interrupting capacity is the headline: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 500 V and 690 V. At 500 V and above the 17 kA rating still covers most motor-control-center bus faults, but verify against your transformer impedance if you're pushing 690 V.
The 80 A rating holds flat from 40 °C to 50 °C, then steps down: 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, 74 A at 70 °C. Dimensions are 130 mm high × 101.6 mm wide × 70 mm deep, so it fits a standard 4-pole MCCB footprint on DIN rail or a panel-mount base.