MATERIAL: INSULATOR:PBT 30% GLASS FIBER (UL94V-0) CONTACT:PHOSPHOR BRONZE OR BRASS CONTACT PLATED:GOLD OR TIN OVER NICKEL SPECIFICATION: CURRENT RATING:1AMP WITHSTANDING VOLTAGE:AC 500V R.M.S INSULATION RESISTANCE:1000MEGOHMS MINIMUM. AT DC 500V. CONTACT RESISTANCE:15 MILLMIOHMS MAXIMUM. OPERATING TEMPERATURE:-40 C~105 C.