Weidmueller VPU AC I 3+1 300/12.5 LH

The VPU AC I 3+1 300/12.5 LH is a voltage protection unit for AC systems. The "3+1" likely indicates three primary protection stages with an additional backup or redundancy stage for enhanced security. "LH" could signify a feature such as low-harmonic or low-voltage protection. "300" refers to the voltage or power capacity, while "12.5" represents a current rating or another key operational parameter. This unit is designed to provide reliable protection for electrical systems, commonly used in industrial or commercial applications to safeguard equipment from voltage surges or fluctuations.