Triac - Measurement of red plastic bar table SCR short T2 and G, is displayed 0.546V (tube on) SCR T405-800T, a popular bar table from G pole display 0.558V SCR, apparently SCR BT134W-600E, the value is greater than the turn-on voltage, but less than Ugt1, maintain the tubes in a conducting state. Upon detecting trigger performance opposite direction, very close to the results described above SCR BT136S-600E, prove good tube performance. Triac - trigger circuit will be two-way SCR SCRl, SCR2 antiparallel. Then the control panel connected to this trigger circuit, to form a simple and practical high-power variable speed circuits. Unique in this circuit is that the thyristor gate without external power, just after the load with this circuit in series power thyristor T405-800T_ positive Wal Electronics (certified) _ SCR by the Dongguan City is Wolfowitz Electronic Technology Limited. 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.