Triac Schematics - works when the anode A with a positive voltage, BG1 and BG2 tubes are in the enlarged state. At this point, if a positive trigger signal input from the control electrode G, BG2 there ib2 base flow flowing through BG2 zoom, its collector current ic2 = β2ib2. Because direct collector electrode connected BG2 and BG1 base, so ib1 = ic. In this case, then by BG1 amplified current ic2, so BG1 collector current ic1 = β1ib1 = β1β2ib2. This current also flows back BG2 base, table positive feedback, so ib2 increasing, so the results of the positive feed cycle, two tubes of current surge SCR BTA212, SCR so saturated conduction. SCR basic voltage characteristics (2) Forward Characteristics very open when the control SCR, with a positive voltage on the anode, J1, J3 junction is forward biased SCR BTA216, but the reverse biased junction J2 SCR BTA412Y This reverse characteristics similar to ordinary PN junction, only a small current flows, called the forward blocking state when the voltage increases, the occurrence of the bending characteristics, such as the characteristics of OA segment shown bent at the UBO call: forward breakover voltage thyristor BTA316, are fertile Electronics (certified), SCR Dongguan City is provided by Wal-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.