Motor protection MCCB with ETU350M — 40 A, 3-pole
Three poles, fitted with the ETU350M electronic overcurrent release, which gives you adjustable time-current curves for coordinating with motor start profiles. Breaking capacity hits 330 kA at 240 V, 242 kA at 415 V, and still 187 kA at 500 V — that's enough for high-fault utility feeds or transformer secondaries where standard MCCBs would cascade. Phase failure detection is built into the release, so a lost phase on the motor feeder will trip the breaker rather than let the motor single-phase and burn. That's the difference between a plain feeder breaker and a motor-protection MCCB — the release watches for unbalance, not just overload.
Sizing for motor duty — AC-3 power ratings
Rated operating power in AC-3 duty (squirrel-cage motor starting, switching during running) is 11 kW at 230 V and 18.5 kW at 400 V.
Panel fit — dimensions and IP rating
That's a 4.1-inch wide footprint — three of these sit in roughly 315 mm of DIN-rail or panel-mount width.
Environmental and electrical ratings
Rated insulation voltage Ui 800 V, so it's suitable for 690 V systems (though the interrupting rating at that voltage is limited). Maximum power loss 10 W at rated current — negligible for panel heat budget.