Weidmueller VPU AC I 3 300/12.5 LH

The VPU AC I 3 300/12.5 LH is a voltage protection unit for AC systems. The "3" likely indicates three protection stages, providing robust protection against voltage fluctuations. "LH" could refer to a feature such as low-harmonic or low-voltage protection. "300" represents the voltage or power capacity, and "12.5" may denote a current rating or other operational specification. This unit is designed to protect electrical equipment from surges and voltage irregularities, typically used in industrial or commercial settings.