What this MCCB does on a motor circuit
It carries a continuous current of 63 A at 40 °C and delivers a 330 kA interrupting capacity at 240 V, which drops to 242 kA at 415 V and 440 V, then to 187 kA at 500 V, and 52.5 kA at 690 V. That interrupting curve means it can handle high-fault scenarios on a 480 V distribution bus without cascading upstream — a solid fit for a motor control center feeding pumps or conveyors. An undervoltage release (UVR) is fitted as standard, so the breaker drops out if line voltage sags below the release threshold. That is useful on machines that must auto-stop on a brownout rather than restart unexpectedly.
Maximum power loss is 75 W at rated current.
Thermal derating and ambient range
Above that it derates: 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C.