Triac - Package packages have used SCR TO-92, TO-126, TO-202AB, TO-220, TO-220AB, TO-3P, SOT-89, TO-251, TO-252 and so on. Triac - Plastic SCR measurements show the red bar at the short T2 and the floating electrode patch SCR 0.546V, the voltage is less than Ugt1 = 0.578V SCR BT134W-600E, so the black Table rods connected to T1, the other pole was G. Trigger Performance discrimination: the red bar pick T2, the black bars connected T1, display overflow (pipe off). SCR BT137S-600E, are fertile Electronics (certified), SCR provided by the Dongguan City is Wal-Electronic Technology Co., Ltd. Dongguan City is Wal-Electronic Technology Co., Ltd. (www.dgmydz.com) (www.dgmydz.com) is Dongguan, FET leader, 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-electronics leader in the positive with the staff warmly welcome all inquiries negotiations to create a positive future Wal-electron better.