It carries a 75.6 kA interrupting capacity at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V — figures that govern its fault-clearing ability at the panel's service voltage.
What the interrupting ratings mean for fit
At 415 V (common in European industrial panels) the rating drops to 52.5 kA, and at 690 V it falls to 10.5 kA.
Thermal derating and continuous current
Above 50 °C it begins to derate: 24 A at 55 °C, 23.5 A at 60 °C, 23 A at 65 °C, and 22.5 A at 70 °C. For a panel that runs warm — say, a packed enclosure near a furnace line or in a hot climate — the actual load must be kept below the derated figure at the enclosure's internal ambient.
The 76.2 mm width (3 inches) is the standard footprint for a 3-pole SENTRON 3VA1 frame; it mounts via screw-clamp lugs to a backplate or DIN-rail adapter (not included). The 70 mm depth leaves clearance for rear-connected busbars or cable ducts behind the breaker.