SCR basic voltage characteristics (2) Forward characteristic when the control electrode is open, with a positive voltage on the anode of SCR, J1, J3 junction is forward biased, but the reverse biased junction J2, which is the general anti-PN junction similar to the properties, only a small current flows, called the forward blocking state when the voltage increases, the occurrence of the bending characteristics, such as the characteristics of OA segment shown bend is called UBO: forward breakover voltage controllable What silicon in the circuit main purpose is? common basic purpose is controllable thyristor rectifier. Familiar diode rectifier circuit are not controlled rectifier circuit. If you replace the diode SCR SCR T405-600T, 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, if there is no input VS of the gate trigger pulse Ug SCR 2P4M, 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 | 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!