Single SCR, triac discrimination: first one of the two test poles, if positive and negative test pointer not moving (R × 1 block), may be A, K or G, A pole (one-way controllable silicon) may also be T2, T1 or T2, G pole (for triac). If one has a measurement instructions for tens to hundreds of European SCR BTA208, it certainly is way thyristor. And a red pen for the connected K-pole, black pen then for G pole, and the rest is the A pole. If the positive and negative test instructions are tens to hundreds of Europe, certainly for the triac. Then dial knob to R × 1 or R × 10 block retest, which must have a resistance slightly SCR BTA216, the slightly larger one red pen then for G pole, black pen connects to T1 pole, The remaining is T2 pole. If SCR remains on A pole or pole disconnect G T2 pole position pointer immediately return ∞, then the SCR trigger current is too large or damaged. The method may further measurements Figure 2, for a one-way SCR, closing the switch K, lights should be lit SCR BTA312, disconnect the lamp is still interest K off, or else explain SCR damage. For triac, closing the switch K, lights should be lit, disconnect K, lights should be quenched. Then reverse battery, repeat the above steps, the result should be the same, it is a good description. Otherwise, it means that the device has been damaged. SCR BTA216, 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! You can also access (www.dgmydz.com/supply_details_48127435.html), for more information about the company.