Triac - thyristor of the plastic tube measuring method itself with a small patch SCR heat sink, usually it is highly connected with the T2, this feature can also be used as a basis for determining T2. As verification, measured between T2 and the heat sink to 0V SCR, so T2 judgment is correct. Then turn red stick T2, then the rest of the black bars any one of bipolar SCR BT134W-600E, is displayed overflow triac - construction principles triac belong NPNPN five devices, three electrodes are T1, T2, G. Because the device can double-conducting thyristor BT137S-600E, so in addition to the two electrodes other than the gate G collectively the main terminal, with T1, T2. He said that no longer divided into the anode or cathode. SCR BT137S-600E, being 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.