Weidmueller VPU I 1 R 280V/12,5KA

The VPU I 1 R 280V/12.5KA is a voltage protection unit for AC systems. "I" likely refers to a specific protection class or type. "1" indicates protection for a single phase or circuit. "R" denotes a reset function. "280V" represents the voltage rating, and "12.5KA" indicates the surge current rating, meaning the unit can withstand up to 12.5 kA of surge current. This unit is designed to protect electrical equipment from voltage surges, offering reliable protection for single-phase systems in industrial or commercial applications that require handling of high surge currents.