Triac structure principle and application of construction principles although can be seen as a combination of two ordinary triac thyristor from the form, but in fact it is more than just seven transistors and resistors power integrated devices. Low-power Triac generally use plastic packaging, and some also with a heat plate, l shape as shown in Figure. Typical products BCMlAM (1A / 600V), BCM3AM (3A / 600V), 2N6075 (4A / 600V) SCR T405-800T, MAC218-10 (8A / 800V) and so on. Triac power they use RD91 package. 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, stage dimming functions, 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 SCR 2P4M, JAG dry reed pipe. JAG usually off thyristor T405-600T, Triac TRIAC is also turned off. Only when small magnets pull closer JAG, bi-directional thyristor SCR, the load power is turned on. Due to the current through the reed is very small, only a few microseconds of time, so the switch long life 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!