The breaker carries an undervoltage release (UVR) as built-in auxiliary release, meaning it can be tripped remotely when control voltage drops, which is common in emergency-stop or safety isolation circuits.
Breaking capacity — what the voltages mean for your fault duty
This MCCB delivers 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V.
At 55 °C it drops to 158 A, at 60 °C to 155 A, at 65 °C to 153 A, and at 70 °C to 150 A. If your enclosure ambient runs 60 °C, you lose 5 A from the nameplate; plan your load at 155 A max continuous.
Environmental and operating limits
No trip indicator, no voltage trigger, no other measurement function.