Weidmueller VPU AC I 1+1 R 300/12.5

The VPU AC I 1+1 R 300/12.5  is a voltage protection unit for AC systems. The "1" likely refers to a single protection stage, while "R" may indicate a specific feature, such as a reset function or a particular type of protection. "300" represents the voltage or power capacity, and "12.5" could denote a current rating or another operational parameter. This unit is designed to protect electrical equipment from voltage spikes or fluctuations in industrial or commercial environments.