Material: Insulator:PBT 30% Glass Fiber (Meet UL94V-0). Contact:Copper Alloy/ Contact Plated:Gold or Tin over Nickel Plated. Specification: Current Rating:1 Amp. Withstanding Voltage:AC 500V for 1 Minute. Insulation Resistance:1000M OHM Min. at DC 500V. Contact Resistance:15m OHM Max. Operating Temperature:-40 C ~ 105 C.