Integrated undervoltage release and neutral protection
Factory-fitted with a 24 V DC undervoltage release (UVR) that drops the breaker on loss of control power — standard for safety circuits where a downstream contactor or safety relay needs to guarantee isolation when the control supply fails. The 100 % N-conductor protection means the neutral pole is switched and protected at the same rating as the phase poles, which is required for 4-wire systems where the neutral carries load current (e.g., 3-phase + N panelboards feeding single-phase loads). The nut keeper kit is included on the line-side and load-side terminals — a small detail that saves panel-build time: the captive nuts stay aligned during torque-down, so one person can terminate lugs without a second set of hands holding the hardware.