Weidmueller VPU ZPA S I 3 R 300/12,5

The  VPU ZPA S I 3 R 300/12,5 is a voltage protection unit for AC systems. "ZPA" refers to a specific model series, "S" may indicate a special feature, and "I" denotes the protection type. "3" indicates three-phase protection, "300" is the voltage rating, and "12.5" refers to the surge current rating, with the unit capable of handling up to 12.5kA, offering protection against voltage surges and fluctuations.