Triac structure principle and application of typical applications Triac can be widely used in industry, transportation, household appliances and other fields, to achieve AC voltage regulator, motor speed, AC switch, automatically turn on and off street lights, temperature control, lamp dimmer, a variety of functions, such as SCR dimming stage 2P6M, it is used for solid state relays (SSR) and solid-state contactor circuit. Figure 5 is a proximity switch circuit constituted by Triac. R is the gate current limiting resistor, JAG dry reed pipe. JAG usually disconnected, Triac TRIAC is also turned off. Only when small magnets pull closer JAG, bi-directional thyristor SCR C106M, the load power is turned on. Due to the current through the reed is very small, only a few microseconds time SCR 2P4M, so switch T2 extremely long life determination G very very close with T1, T2 very far away. Therefore, positive and negative resistance between G-T1 is very small. RXl file with resistance measured between any two feet, only between the G-T1 exhibits low resistance, positive and negative resistance SCR only a few dozen in Europe, and T2-G, are between T2-T1 reverse resistance are infinite. This suggests that, if measured in a foot and other feet do not pass, it certainly is extremely T2. In addition, the use of TO-220 package Triac, T2 is usually very little communication with the cooling plate, thus also determine the T2 pole SCR 2P6M, SCR, are fertile Electronics Dongguan City is provided by Wal-Electronic Technology Co., Ltd. Dongguan City is Wal-Electronic Technology Co., Ltd. (www.dgmydz.com) (www.dgmydz.com) strong, credible, FET and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the electronics are fertile and you hand into the brilliant, for a better future!