Triac - construction principles triac thyristor devices belong NPNPN five BT137S-600E, three electrodes are T1, T2, G. Because the device can double conduction, so the two gate electrodes in addition to the main terminal thyristor G collectively BT136S-600E, with T1, T2. Said that no longer divided into the anode or cathode. Triac - voltage characteristic way thyristor junction J3 also received poor breakdown SCR, the rapid increase in current, start bending characteristics, such as characteristic OR segment, the voltage at the URO bend called "reverse breakover voltage . " At this point, the SCR will be a permanent reverse. SCR _ are fertile patch Electronics (certified) _ SCR provided by Dongguan City is fertile Electronic Technology Co., 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.