Weidmueller VPU I 2 R 280V/12,5KA

The  VPU I 2 R 280V/12,5KA is a voltage protection unit for AC systems. "I" likely indicates a specific protection class or type. "3" refers to protection for three phases or circuits. "R" denotes a reset function. "280V" represents the voltage rating, and "12.5KA" indicates the surge current rating, meaning the unit can handle up to 12.5 kA of surge current. This unit is designed to protect electrical equipment from voltage surges, providing reliable protection for three-phase systems in industrial or commercial applications where high surge current protection is required.