PrintLightning Arrestors Features and Benefits: Clamping level – 130 VRMS Response times – <5 nanoseconds Filtering Energy – 500 joules, 10 x 1,000 usec Pulse life – 1,000-10,000 amp pulse UL 1449 Listed surge suppressor Complete protection between ground, neutral and phase Specs/Part #s Approx. Wt. Lbs Dimensions Single Phase Volts Surge Current Amps Description Model Number .25 3.14 x 2.66 x 1.14 120/240 50,000 External ELDTK120240CM .2 3.01 x 1.69 x 1.6 110/125 39,000 Internal ELDTK120HW