Detection of a triac with a multimeter resistance R * 1Ω block, with red, black and two pen were measured between any two pins positive and negative resistance, the result of which two readings of infinity. If a group of tens of ohms, the group of red and black two-pin connection table for the first anode A1 and the gate G SCR BTA316, another empty foot is the second anode A2. Determine A1, G pole, and then carefully measured A1, G pole between positive and negative resistance readings that measure relatively small black table pen connects to pin the first anode A1 SCR, red table document pin-gate G. The black pen then identified the second anode A2 SCR BTA216, the red pen then the first anode A1, this time should not deflect the meter pointer SCR BTA208, resistance is infinite. 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), MAC218-10 (8A / 800V) and so on. Triac power they use RD91 package. SCR BTA312_ are fertile Electronics (certified) _ SCR Dongguan City is provided by Wal-Electronic Technology Co., Ltd. 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. You can also access (www.dgmydz.com/supply_details_48240060.html), for more information about the company.