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 Contact Resistance：20mΩ (Max) Insulation Resistance：1000MΩ Dielectric Strength：1500VAC For 1 Minute Temperature Range：-30℃～+85℃ Safety Approal：UL CUL CQC ROHS Electrical Life:30000Make-and-break-Cycles At Full Load