Triac Schematics - A method of detecting extremely determination T2 be seen from Figure 6, G pole and pole near the thyristor T1 T405-600T, very far away from T2. Therefore, positive and negative resistance between G-T1 is very small. RXl file with resistance measured between any two feet, only between the G-T1 exhibits low resistance, positive and negative resistance is only a few dozen in Europe, and T2-G, are between T2-T1, reverse Resistors are infinite. This suggests that, if measured in a foot and other feet do not pass, it certainly is extremely T2. Also SCR C106G, using TO-220 package Triac, T2 is usually very small cooling plate connectivity, thus also determine the T2 pole. 2. After distinguishing T1 G pole and pole (1) identify the T2 pole, first assume that the rest of the feet in a foot of Tl pole, the other foot for G pole. (2) the black pen then T1 pole, the red pen then T2 pole, resistance is infinite. Followed by the red pen to T2 and G short for G-pole with a negative trigger signal, the resistance value should be around ten Euro (see Figure 6 (a)), the tube has proved conduction, conduction direction T1 a T2. Then the red pen and G pole disengaged (but still connected to T2), if the resistance value remains unchanged, prove tubes can be maintained after the trigger conduction state (see Figure 6 (b)). What SCR in the circuit main purpose is? Common basic purpose is controllable thyristor rectifier. Familiar diode rectifier circuit are not controlled rectifier circuit. If the diode into SCR, can constitute a controlled rectifier circuit. Now I draw a simple single-phase half-wave controlled rectifier circuit]. Sinusoidal AC voltage U2 during the positive half cycle of thyristor 2P6M, if there is no input VS of gate trigger pulse Ug, VS is still not turned on, only when U2 is in the positive half cycle, when the gate trigger pulse is applied Ug, SCR is triggered conduction. Now, draw its waveform, it can be seen only when the trigger pulse arrival Ug, the load RL have UL output voltage (waveform chart shaded area). SCR T405-600T_ 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_39359645.html), for more information about the company.