7A系列详细资料如下: CONTACT RATING: 1A.MP @ 120VAC OR 28VDC max. 0.4Volt-Amps(VA)@20Vmax(AC or DC) ELECTRICAL LIFE:50,000 make-and-break cycles at full load. CONTACT RESISTANCE:20m Ω max.initial @ 2-4VDC 100mA for both silver and gold plated contacts. INSULATION RESISTANCE:1,000M Ω min. DIELETRIC STRENGHT:1,000V RMS @ sea level. OPERATING TEMPERATURE:-30℃ TO 85℃. MATERIALS CASE&BUSHING:Glass filled nylon 6/6,flame retardant,heat stabilized(UL94V-0) ACTUATOR:Brass,chrome plated with internal,O-ring seal standard. SWITCH SUPPORT:Brass or steel,tin plated. SWITCH SUPPORT RETAINER:Stainless steel. CONTACTS/TERMINALS: Silver or gold plated copper alloy.