The 63 A rating holds steady from 40 °C to 50 °C, then derates to 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. The TM120M thermal-magnetic release handles the overload curve, so the breaker doubles as a motor-protective device, not just a straight feeder.
Breaking capacity by voltage
Breaking capacity drops as voltage rises: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 7.5 kA at both 500 V and 690 V. That steep drop above 440 V means this breaker is really at home on 240 V or 415 V systems — at 690 V the 7.5 kA figure may still cover a low-fault industrial panel, but verify against your available fault current.