General Specification Current Rating : 5, 10, 15, & 30 AMPS. Voltage Rating : 500Volts Temperature Range : -30 ℃ to 75 ℃ Dielectric Strength : 2500 Vrms between the conductors. Insulation Resistance : 20M W(Min) at 500 VDC Material Specification : Insulator : Phenolic Black Connector : Brass with .0001" thick Nickel over it. Screw : Combination Head, over .0001" thick Zinc over Steel / Nickel Over Brass