Triac - thyristor at this time measurement plastic tube into a conducting state thyristor will BT137S-600E, should show a slightly lower value than Ugt1. Then SCR BT136S-600E, at the red bar constantly open G T2 premise and off thyristor, the trigger high sensitivity, small tubes for holding current SCR T435-600T, at this time remains the guide tube state, the display is slightly larger than the trigger is turned on, but less than Ugt1 triac - package package are commonly used SCR TO-92, TO-126, TO-202AB, TO-220, TO -220AB, TO-3P, SOT-89, TO-251, TO-252 and so on. SCR, is fertile Electronics (certified), SCR provided by the Dongguan City, is Wo Electronic Technology Co., Ltd. Dongguan City is Wo Electronic Technology Co., Ltd (www.dgmydz.com) (www.dgmydz.com) Dongguan, Guangdong, FET leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. Wal-e-leadership in the positive with the staff warmly welcome all inquiries negotiations to create a positive fertile electronic better future.