LAY37 series pushbuttons are pushbutton switches with base diameter of 22mm, including general type pushbuttons, auto-locked type pushbuttons, mushroom type buttons, rotary type switches, key type switches, LED pushbuttons, and indicators. These products are applied as cam control in the controlling circuits with rated frequency of AC 50Hz or 60Hz, rated voltage up to 600V, DC up to 440V for direct control for electromotor of low horsepower changing and connecting circuit, and indicting signals. This product conforms to the standards of GB14048.9, GB14418.5 and UL508 Standard, using the high class burning-resistant insulating material to ensure safety. Our quality management system has been certificated by ISO9001 and all of the products have obtained the CE, CCC and UL cetification.