At 415 V and 440 V it still holds 187 kA, dropping to 121 kA at 500 V, and 3 kA at 690 V. This is a breaker built for heavy industrial fault duty, not a light commercial branch device.
Fault duty and selectivity
At 690 V the 3 kA rating is lower, so verify coordination if the breaker is applied on a 690 V system with significant fault potential.
What's on the frame
The UVR means the breaker drops out if control voltage is lost, which is standard for emergency-stop chains and safety circuits. The trip indicator shows a mechanical flag when the breaker has tripped on fault, not just been switched off.
Power loss is 16 W maximum at rated load, which is modest for a 100 A breaker — helps keep enclosure internal temperature down.
