Motor protection MCCB with ETU350M trip unit
It carries a 187 kA interrupting capacity at 240 V, dropping to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V — meaning it clears high fault currents across common industrial voltages without cascading upstream breakers.
Maximum power loss is 75 W, which should be factored into enclosure thermal calculations, especially when multiple breakers are ganged.
Environmental and electrical ratings
Rated continuous current holds at 40 A from 40 °C through 50 °C ambient, then derates to 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C. No auxiliary contacts or ground-fault monitoring are integrated on this variant.