general specification current rating : 10 amps. voltage rating : 500 v.ac temperature range : -30 ℃ to 75 ℃ dielectric strength : 2500 vrms between the conductors. insulation resistance : 20mw (min) at 500 vdc material specification : insulator : phenolic black / anti - tracking melomine connector : brass with .0001" thick nickel over it. screw : combination head, over .0001" thick zinc over steel. .