Only three characteristics SCR anode voltage A removal or anode A, K pressure change between the cathode polarity (AC zero) when the SCR, was converted by the low resistance one-way thyristor conduction state to a high-impedance off state. Once the cut-off thyristor way, even between the anode and the cathode K A again with a positive voltage, still in the control electrode G and cathode K between there again with a positive trigger voltage before conduction. Way thyristor conduction and cutoff switch is closed and the state is equivalent to a disconnected state SCR BTA216, it can be made with a non-contact switch. 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, the other foot is the empty second anode A2. Determine A1, G pole after SCR BTA140, then carefully measure A1, G pole between positive and negative resistance readings that measure relatively small black table pen connects to pin the first anode A1 SCR BTA412Y red table pen connects the control electrode pin G. The black pen then identified a second anode A2, the red pen then the first anode A1, this time should not deflect the meter pointer, resistance is infinite. SCR BTA412Y | 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_39267945.html), for more information about the company.