3N243

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

Optoisolators are electronic components used mainly for providing electrical isolation between two circuits. This allows the two circuits to be galvanically separate without leaving any electrical trace on each other. As a form of optical isolation, they are considered safe for use in hazardous environments where higher voltage applications and sensitive equipment could be susceptible to electric shocks. The 3N243 optoisolator is an optically isolated, transistor with photovoltaic output.

3N243 Application Field and Working Principle

The 3N243 is most commonly used for protecting sensitive logic circuitries from the malfunction that is caused by excessive input voltage. By placing an optocoupler in series with the input line, the transformer action of the device isolates the working voltage of the circuit from the input voltage. The isolated, low voltage circuit will be protected from voltage transients and supply noise. It is also widely used in medical devices, industrial controls, display interfaces and telecommunication equipment.

The 3N243 optocoupler consists of a phototransistor optically coupled with a photovoltaic diode. When the photovoltaic-diode receives light, it converts the light energy into an electrical current which is then converted into an output voltage by the phototransistor. This generated current amplifies and the signal is used as an output voltage. The transistor output can then be used to either switch an external load, or to provide timing and logic functions.

Features

• High current transfer ratio
• High output current
• High isolation between input and output
• High switching speed

Advantages

• The optocoupler offers isolation between input and output caused by potential differences which eliminates the need for additional insulation.
• It also provides instant response time which is useful for faster operations.
• The device has high noise immunity since it does not depend on conduction by electrons. Noise from its environment does not affect its performance.
• The device is small in size and it occupies much less space.
• It also eliminates the effect of ground loop which is one of the most common causes of unwanted signals.

Conclusion

The 3N243 optocoupler is an ideal choice for electrical isolation in a variety of applications including medical devices, industrial controls, display interfaces, and telecommunication equipment. It provides significant benefits such as high current transfer ratio, high output current, high isolation, high switching speed, noise immunity, and quick response time. It is also small in size and occupies much less space.

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