That makes it a straight replacement for a fixed-trip MCCB in a distribution board or motor control center where coordination studies have already locked in the trip curve.
The interrupting ratings span the common industrial voltages: 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. At 415 V — the standard three-phase distribution voltage in much of Europe and Asia — 75.6 kA gives you comfortable headroom above a typical 50 kA or 65 kA fault-current spec at the main switchboard.
Thermal derating — the real-world current
At 55 °C it drops to 39 A, at 65 °C to 38 A, and at 70 °C to 37 A. If this breaker sits next to a row of contactors or drives that push the enclosure internal temperature to 55 °C or higher, factor that 1–3 A reduction into your load calculation.
Dimensions: 130 mm high, 76.2 mm wide (3 inches — standard MCCB footprint), 70 mm deep. The 3-pole width matches the common 3-inch mounting pattern for Siemens 3VA frame breakers, so it drops into an existing panel cutout or DIN-rail adapter without re-drilling.