SCR SCR BTA412Y features only three anode voltage A removal or anode A, between the cathode voltage polarity change K (AC zero), the only way thyristor converters by low resistance conduction state to high resistance 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. Close and open way thyristor conduction state and off-state equivalent of the switch, which can be made with a non-contact switch. In the waveform controlled rectifier circuit, found within the SCR SCR BTA212 withstand the forward voltage of each half cycle, the first time issued a trigger pulse are the same, that is, the control angle α and conduction angle θ are equal, then the single-junction transistor relaxation oscillator exactly how to cooperate with the AC power supply in order to achieve effective control of it? When the AC voltage zero-crossing instant, SCR VS forced shutdown, the relaxation oscillator is energized, they began to charge the capacitor C, repeat the process. Thus, each time after AC voltage zero crossing, the first time issued a relaxation oscillator are the same trigger SCR, this time depends on the resistance of RP and C capacitance. Adjusting the resistance of RP, can change the charging time of the capacitor C, the first time it changed Ug issued, a corresponding change of the control angle of the thyristor, so that the average value of the output voltage across the load RL is changed, to achieve the purpose of the regulator. SCR BTA212, are fertile Electronics (certified), SCR provided by the Dongguan City is 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_42539850.html), for more information about the company.