Triac - thyristor measurements show 0.546V plastic red stick at short T2 and the floating electrode, the voltage is less than Ugt1 = 0.578V, so black bars are connected to T1, then the other pole as G. Trigger Performance discrimination: the red bar then T2, then T1 black bars SCR T435-600T, display overflow (pipe off). Triac - construction principle characteristic is that when G pole and T2 pole with respect to T1, all positive voltage thyristors BT137S-600E, T2 is the anode of SCR BT136S-600E, T1 is the cathode. Conversely, when the G pole and pole with respect to the voltage of T1 T2 are negative, T1 timer into the anode, T2 is a cathode. Since the triac forward and reverse curve symmetry, it can be turned in either direction. SMD SCR | n Wal Electronics (certified) | SCR provided by the Dongguan City is fertile Electronic Technology Co., 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.