Weidmueller VPU AC I 4 300/12.5

The VPU AC I 4 300/12.5 is a voltage protection unit for AC systems. The "4" likely indicates four protection stages or circuits, offering comprehensive safeguarding against voltage fluctuations. "300" refers to the unit's voltage or power capacity, and "12.5" could represent a current rating or another operational specification. This device is designed to protect electrical systems and equipment from voltage surges, typically used in industrial or commercial applications.