The TM220 release gives you an adjustable short-circuit trip threshold up to 800 A, which covers motor-start inrush or transformer magnetizing peaks without nuisance tripping.
Breaking capacity — the real number for your fault level
This breaker carries a 220 kA interrupting rating at 240 V AC, dropping to 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 500 V and 690 V. At 690 V the 17 kA still covers most industrial motor branch circuits. For DC applications, the maximum rated operational voltage Ue is 600 V; the 3VA molded case circuit breaker device manual covers the DC switching power values.
Thermal derating — what 80 A means at panel temperature
At 55 °C it derates to 78 A, at 60 °C to 77 A, at 65 °C to 75 A, and at 70 °C to 74 A.
The N-conductor protection is rated at 100%, meaning the neutral pole is fully rated — important for 4-wire systems where neutral harmonics or unbalanced loads are present.