SCR principle When the anode A side with a positive voltage, BG1 and BG2 tube pipe are in the enlarged state, then SCR T435-600T, then from the control electrode G a positive trigger signal input, BG2 tube will There ib2 base current flows, the current flowing through the pipe to the collector BG2 SCR T405-800T, enlarged to ic2, ic2 = β2ib2, ic2 along the circuit flow to the base BG1 tube pole, so there ib1 = ic2, stream After BG1 tube, reaches the collector current becomes ic1, ic1 = β1ib1 = β1β2ib2, BG2 this current flows back into the base, so that ib2 increased to ib2 = ic1, thus forming a positive feedback loop so that the current surge, it is SCR to reach saturation and conduction. SCR is turned on and off only two states, with the switching characteristics, changing its status there are some prerequisites. Transition from the off state to a conduction state when the thyristor, the anode potential is always higher than that required to meet the cathode potential, and the control electrode have sufficient forward voltage and current; when maintained in the ON state, the anode potential is higher than the cathode to be met potential, and the anode current is greater than maintaining the current; transition from conduction state to the OFF state, the need to meet the anode potential is lower than the cathode potential, or anode current is less than the holding current. A high voltage thyristor way to monocrystalline silicon as the basic material P1N1P2N2 four three-terminal device thyristors BT136S-600E, created in 1957, due to its characteristics similar to the vacuum thyratron, so internationally known as Silicon Thyristors, referred to as SCR T. Also, because the thyristor controlled rectifier initially applied to aspects of so called silicon controlled rectifier elements, referred to as SCR SCR. SCR SCR _ BT136S-600E_ are provided by Wal-electronic Dongguan City is fertile Electronic Technology Co., 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!