Material: Insulator:PBT 30% Glass Fiber (UL94V-0) Contact:Copper Alloy. Contact Plated:Gold or Tin over Nickel Plated. Specification: Current Rating:3 Amp. Withstanding Voltage:AC 500V for 1Minute. Insulation Resistance:1000M OHM Min. at DC 500V Contact Resistance:15m ohm Max. Operating Temperature:-40 C ~ 105 C