MCCB for line protection with high interrupting capacity
Interrupting rating drops with system voltage: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V.
The breaker holds 40 A continuously up to 50 °C ambient. Above that it derates gradually: 39 A at 55–60 °C, 38 A at 65 °C, 37 A at 70 °C. Maximum power dissipation is 13.3 W — relevant for enclosure heat calculations when several breakers are ganged.
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that mounts on a DIN rail or directly to a backplate via the screw terminals. No communication module or ground-fault monitoring is integrated on this variant.