EL357NA(TB)-VG

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 devices designed to improve the insulation and robustness of an electrical system by completely isolating one sub-circuit from another via a light path. EL357NA(TB)-VG is a photovoltaic transistor output optoisolator, which can provide up to 500V AC isolation for general purpose applications. It offers long term stability and low propagation delay, making it suitable for a range of applications.

Working Principle

EL357NA(TB)-VG optoisolators employ an infrared emitting diode optically coupled with a phototransistor constructed in a 6-pin, dual-in-line (DIP) package. The optoisolator consists of two light-actuated electronic switches. The infrared emitting diode is linked to the input circuit, while the phototransistor is connected to the output circuit. When the infrared emitting diode is switched on, the phototransistor is turned on as well.

The operating drive current for the EL357NA(TB)-VG optoisolator is typically around 10 mA. When the input current is switched off, the photo-current of the phototransistor quickly decreases to a non-conductive level. The switching speed of the phototransistor is highly dependent on the forward current of the input. When the input current is low, the transistor switch off time may be as high as 5µs.

Application Field

The EL357NA(TB)-VG optoisolator is ideal for use in applications requiring AC isolation. AC isolation is required to ensure that there is no communication between the input and output circuits. The EL357NA(TB)-VG isolator offers up to 500V AC of isolation, making it an excellent choice for use in medical equipment, industrial automation, and many other applications. Its two-channel configuration makes it suitable for applications requiring switching current from both sources simultaneously.

The EL357NA(TB)-VG optoisolator can also be used for input protection in industrial control systems. Its 500VAC isolation allows for the use of low voltage control signals for control of the system. This eliminates the need for costly and bulky high voltage wiring. Additionally, the EL357NA(TB)-VG offers excellent electrical noise immunity, making it ideal for use in applications where transients can cause false triggering.

EL357NA(TB)-VG optoisolators are also well-suited for use in optically controlling electrical loads. When used for this purpose, the phototransistor of the optoisolator is switched on by the forward current of the infrared emitting diode. As the current is switched on, the phototransistor is turned on as well, allowing the optical signal to control the electrical load.

Conclusion

EL357NA(TB)-VG optoisolators are an ideal solution for applications requiring AC isolation, input protection, and optically controlling electrical loads. Its 500V AC isolation, long term stability, and excellent noise immunity make it suitable for a wide range of applications. Additionally, its two-channel configuration makes it an ideal choice for applications requiring simultaneous switching of current from two sources.

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