Bidirectional thyristor is a thyristor rectifier device, also known as bidirectional thyristor. The device can realize contactless control of alternating current in the circuit and control large current with small current, and has the advantages of no spark, fast action, long service life, high reliability and simplified circuit structure.
Except one electrode G, which is still called the control electrode, the other two electrodes are usually called the main electrodes t 1 and T2, instead of the anode and cathode. Its symbol is also different from ordinary silicon controlled rectifier, which is made up of two silicon controlled rectifiers connected in reverse. Its model is generally represented by "3CTS" or "KS" in China.
Extended data:
The main parameters of SCR are:
1, rated on-state average current IT, the average value of 50 Hz sinusoidal half-wave current that can continuously pass between anode and cathode under certain conditions.
2. Forward blocking peak voltage VPF When the control electrode is open and no trigger signal is added, and the anode DC voltage does not exceed the conduction voltage, the forward peak voltage applied to both ends of the thyristor can be repeated. The peak value of DC voltage borne by SCR should not exceed this parameter value given in the manual.
3. Reverse blocking peak voltage VPR When the thyristor is in the reverse off state with reverse voltage, the reverse peak voltage applied at both ends of the thyristor can be repeated.
Baidu encyclopedia -SCR