The 75.6 kA breaking capacity at 240 V and 52.5 kA at 415 V mean it safely interrupts faults up to those levels without cascading upstream — critical for high-fault-current installations like industrial mains or transformer secondaries.
Above that, derating is linear: 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. In a sealed panel or high-ambient motor room, use the 55 °C or 60 °C column to size the breaker for continuous load — the 50 A nameplate applies only when ambient stays at or below 50 °C.
The breaking capacity varies by system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V. The steep drop above 440 V means the breaker is not suitable for high-fault 690 V mains without coordination study — the 7.5 kA figure may be adequate for transformer-fed sub-distribution but not for direct connection to a high-capacity 690 V bus.
Integration notes
The 76.2 mm width (3 inches) matches the standard SENTRON 3VA footprint for 3-pole breakers, so it drops into the same cutout as other 3VA frames. The undervoltage release is factory-fitted; no field assembly required. The TM210 release is non-interchangeable — the breaker is ordered as a complete unit.