钮子开关价格南通钮子开关钮子开关厂家​宏聚电子供Rating：3A 120VAC OR 28VDC ContactResistance：20mΩ (Max) Insulation Resistance：1000MΩDielectric Strength：1500VAC For 1 Minute Temperature Range：-30℃～+85℃Safety Approal：UL CUL CQC ROHSElectrical Life:30000Make-and-break-Cycles At Full Load