Way thyristor detection resistor R * 1Ω multimeter selected block SCR 2P4M, with red, black and two pen were measured between any two pins to identify positive and negative resistance until a reading of tens of ohms pin, At this point black pen pin for the control electrode G, red pen pin cathode K, another empty pin anode A. The black pen then have to determine the anode A, the red pen is still attached to a cathode K. Multimeter pointer should not move at this time. By shorting the anode A short moment and the gate G SCR T405-600T, this time multimeter power block pointer should be deflected to the right, the resistance reading of about 10 ohms. When connected to the anode A black pen, red pen connect the cathode K, the meter pointer deflection SCR T405-800T, indicating that the way thyristor has breakdown. Triac detect two short wires will then A2, G very short instant, giving G pole with a positive trigger voltage, A2, A1 between the resistance of about 10 ohms. Then disconnect the A2, G between short wiring multimeter reading should remain around 10 ohms. Interchangeable red and black pen wiring, the red pen then the second anode A2, black pen then the first anode A1. Likewise meter pointer deflection should not occur, resistance is infinite. With short connection to A2, G again very short moment between, plus resistance to G very negative trigger voltage, A1, A2 is between about 10 ohms. Then disconnect the A2, G extremely short wiring between the multimeter reading should remain unchanged, maintained at about 10 ohms. Comply with the above rules, instructions and test triac undamaged three pins to determine the polarity is correct. 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! You can also access (www.dgmydz.com/supply_details_49355635.html), for more information about the company.