Weidmueller VPU AC II+III 1+1 440/20 S

The VPU AC II+III 3+1 275/20 S is a voltage protection unit for AC systems. "II+III" indicates combined Class II and Class III surge protection, offering a higher level of protection for sensitive equipment. "3+1" refers to protection for three phases plus neutral. "275" represents the voltage rating, and "20" signifies the current rating. "S" likely denotes a specific feature, such as a monitoring function or additional protective function. This unit is designed to safeguard electrical equipment from voltage surges and fluctuations, providing enhanced protection in industrial and commercial settings.