· PK1000:
       Diagnostic LED
       Small footprint
       Parallel connection
       Three voltage configurations
· PK1001:
       Multiple clamping voltages
       Modular
       Provides over voltage protection
       Self resetting fusing
       Self Restoring
· PK1002:
       Receptacle ground pin option
       Extra low impedance
       Plug and play RJ45 jack
       Extra tight clamping
· PK1003:
       Parallel function
       2 pair terminal strip
       30 volt configuration