Weidmueller VPU III R 24V/4KV AC/DC

The  VPU III R 24V/4KV AC/DC is a voltage protection unit for AC systems. "II" indicates Class II surge protection, and "F" might refer to a specific feature or function, such as a particular configuration or design. "1+1" refers to protection for one phase plus neutral. "R" denotes a reset function. "300" represents the voltage rating, and "40" signifies the current rating. This unit is designed to protect electrical equipment from voltage surges and fluctuations, offering reliable surge protection for single-phase systems with neutral, typically used in industrial or commercial settings.