1There are 4 kinds of button switch of different indicator light colors for you to choose from. 2Long service life.The mechanical service life is 5000000 times and electronic service life is 500000 times. 3The indicator light is powered by 220VAC power source. 4The contact material is silver alloy of low resistance and high electrical conduction. 5This button is suitable for action control in AC 50Hz, voltage 380V and below, DC 220V and below electromagnetic starters, contactors, relays and other electrical circuits.Features:There are 4 kinds of button switch of different indicator light colors for you to choose from. Long service life.The mechanical service life is 5000000 times and electronic service life is 500000 times. The indicator light is powered by 220VAC power source. The contact material is silver alloy of low resistance and high electrical conduction. This button is suitable for action control in AC 50Hz, voltage 380V and below, DC 220V and below electromagnetic starters, contactors, relays and other electrical circuits. Specification:Model:BEM38-11DButton Color:Red/Yellow/Blue/Green(optional)Indicator Light Voltage:AC 220VSwitch Rated Voltage:440VUi:AC660VWorking Current:10AFunction:Self-ResetContact Mode:1 on 1 offInstallation Hole Diameter: 22mm/0.87inRated Heat Current: 15AContact Material:Silver alloyContact Resistance: 50ohmInsulation Resistance: 50MohmMechanical Life:5000000 timesElectronic Life:500000 timesSize:82 x 35 x 29mm / 3.23 x 1.38 x 1.14in Package List:10 x Button Switch