It carries 2 NO leading auxiliary contacts that change state ahead of the main contacts, giving the PLC or safety relay a clean status signal before the power circuit opens.
The release fits S00, S0, S2, and S3 frame sizes of the motor circuit breaker families. Width is 19 mm and depth is 68 mm.
Deployment context
The leading auxiliary contacts (2 NO) are mechanically linked to the release armature — they close before the breaker trips, so the control system sees the undervoltage condition before the load drops.