Line protection breaker with TM220 release
The 63 A rating holds flat from 40 °C through 50 °C, then begins a gradual derating curve: 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. In a sealed enclosure with poor airflow, the effective continuous current is the derated value at the internal ambient, not the nameplate 63 A. The breaker occupies a 76.2 mm wide by 130 mm tall footprint with a 70 mm depth behind the panel — standard for a 3-pole MCCB in this class, so it drops into a DIN-rail or backplate layout sized for a SENTRON 3VA or 3VM frame without re-drilling.