The interrupting capacity reaches 75.6 kA at 240 V, dropping to 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at 500 V and 690 V — so it handles high-fault conditions on the secondary side of a distribution transformer or at a service entrance.
The 50 A rating holds steady from 40 °C up to 50 °C, then derates to 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C.
Physical fit and mounting
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures with the appropriate mounting base. Power loss at rated load is 14.6 W, which factors into enclosure thermal calculations.