CQ202-4BS-2

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Thyristors - TRIACs is a type of power semiconductor device which is used in electromagnetic relay traffic signal; electric furnace temperature control; motor speed control; AC powering of two directional flow tubes; household AC switches; pulsed power supplies and telephone line switch control.

CQ202-4BS-2 is one kind of Silicon Bidirectional Thyristor (TRIAC) which comprises of two antiparallel thyristors with a common gate. The CQ202-4BS-2 is mainly used in the switching mode power supply application, controlling the output voltage and current in the AC power systems. It is also used in street lighting, electronic ballast, welding machines and so on.

The working principle of CQ202-4BS-2 is based on the conduction of current in only one direction, in either direction. This thyristor has three terminals, which are the AC input and output and the Control Gate. The device is mainly supplied with a small AC current, which produces a small forward voltage drop across the gate-cathode junction. This forward voltage drop triggers the thyristor and switch between the anode and cathode. This triggering process can be achieved either through external biasing or using an external control circuit.

The external biasing process of CQ202-4BS-2 requires the use of a capacitor that stores the charge and a resistor that controls the flow of the charge. This external capacitor creates an electrical field which pulls the current through the thyristor. The external control circuit helps to rectify the current output. It is mainly composed of MOSFETs, which rectify the current output, helps in controlling the trigger voltage, and also reduces the turn-on time of the thyristor.

The CQ202-4BS-2 is also used in AC motor speed control, where it controls the voltage and current of the AC motor. The thyristor helps control the voltage output of the AC motor. It also helps regulate the current flow, which is necessary for achieving the desired speed.

The other uses of the CQ202-4BS-2 are for AC power supply of two directional flow tubes, which are employed in medical equipment, laser systems and telecommunication. The thyristor helps to control the out voltage and current of the AC power supply.

In conclusion, the CQ202-4BS-2 is a silicon bidirectional thyristor (TRIAC), mainly used for switching mode power supply applications and other AC motor speed control applications. Its principle of operation involves external biasing or using an external control circuit and helps to control the voltage and current output of the AC system.

The specific data is subject to PDF, and the above content is for reference