EL817(A)-G

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Optoisolators - Transistor, Photovoltaic Output

The EL817(A)-G series is a range of phototransistor optocouplers manufactured by Vishay Semiconductors. It is designed for use in high frequency switching applications requiring high temperature and avalanche energy ratings.The EL817(A)-G range includes a photodetector and an NPN transistor in a 6-pin dual-inline package, with an isolation rating of up to 5,000 Volts. The device offers an extremely fast and reliable data transmission over long distances, providing superior isolation performance with low crosstalk and low emissions.The optoisolator works by using light to transfer electrical power between two isolated regions. An infrared LED emitter produces electromagnetic radiation, which is then received by a photodetector and converted into an electrical signal. This signal is then transmitted through the optoisolator\'s internal transistor to its output.The electrical isolation provided by the EL817(A)-G opto series is incredibly high, providing superior noise immunity, excellent EMI reduction and stable operation over operating temperature ranges. The device operates from 0°C to +105°C with no additional heat sink, ensuring reliable operation.In terms of electrical parameters, the opto series offers guaranteed CTR (Current Transfer Ratio) performance up to 500% at an input current of 1mA. CTR is the ratio of current through the output transistor\'s collector to the LED\'s forward current. This is an important indicator of the quality of the opto coupling. Additionally, the device offers a current transfer ratio of 1.1V at 500% CTR and 5msec response time.When it comes to applications, the EL817(A)-G is mainly used in high-reliability, isolated industrial control systems, such as process control systems and monitoring systems. Additionally, the device is suitable for demanding electrical applications such as medical equipment, computers, servers, and power-conversion systems.In conclusion, the EL817(A)-G series of phototransistor optocouplers offer superior isolation, low power consumption, and quick response time. These features make the opto series an ideal choice for applications requiring reliable isolation, noise immunity, and high EMI reduction.

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