What the 63 A rating and 76 kA breaking capacity mean for fit
The TM220 thermal-magnetic release provides inverse-time overload protection and instantaneous short-circuit trip — the 220 designator indicates a fixed thermal pickup of 63 A and a magnetic trip threshold of 10x In (630 A), so it holds motor inrush without nuisance tripping. Breaking capacity reaches 76 kA at 240 V AC, 53 kA at 415 V, and 32 kA at 440 V; at 500 V it still interrupts 12 kA.
The 63 A rating holds flat from 40 °C through 50 °C (63 A), then derates to 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. That means in a 50 °C panel ambient — common in enclosed switchgear — you still get full 63 A; above that, plan for the derated value. IP40 on the front protects against tool entry but not washdown, so mount inside a sealed enclosure in wet environments.