Weidmueller VPU AC I 1 R 300/12.5 LH

The VPU AC I 1 R 300/12.5 LH  is a voltage protection unit for AC systems. The "4" likely indicates four protection stages, offering comprehensive safeguarding against voltage fluctuations. "LH" could refer to low-harmonic or low-voltage protection, providing additional security features. "300" represents the voltage or power capacity, and "12.5" may denote a current rating or operational specification. This unit is designed to protect electrical systems and equipment from voltage surges, commonly used in industrial or commercial settings.