EL817(S1)(TU)-G

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Optoisolators have become a staple in the electrical engineering industry. They are used to ensure that no direct electrical connection is made between two circuits, allowing for the safe transmission of electrical signals. The EL817(S1)(TU)-G is a member of the optoisolator family and has been designed for use in a variety of applications. This article will discuss the applications of the EL817(S1)(TU)-G, as well as its technical specifications and working principle.

Applications

The EL817(S1)(TU)-G is a versatile optical coupler that can be used in a variety of applications. It is most commonly used in analog and power circuit control, which requires voltage isolation and high-speed response. It is also suitable for medical, industrial, and audio applications, as well as other applications that require high-voltage isolation or loop control.

It is also commonly used in automotive applications, such as engine control, car electronics, and anti-lock braking systems. It can also be used in various unsafe environments, such as those that require lightning or otherwise hazardous insulation. In these cases, the EL817(S1)(TU)-G can provide superior protection while still allowing the successful transmission of signals.

Technical Specifications

The EL817(S1)(TU)-G is composed of a photodiode and an NPN transistor. The photodiode is constructed from GaP (Gallium Phosphide) material and operates in a peak wavelength range of 575nm. It has a low dark current, fast response time, and a maximum collector current of 0.5mA. The NPN transistor has a transfer ratio of between 85-90%, a collector-emitter voltage of up to 40V, and a maximum collector-emitter saturation voltage of 0.5V.

The EL817(S1)(TU)-G also has a high insulation resistance of up to 1TΩ, a surge withstand voltage of up to 6kV, and a UL flammability rating of V-4. It is also RoHS compliant and has an operating temperature range of -40°C to +105°C.

Working Principle

The EL817(S1)(TU)-G operates by detecting changes in light intensity. When a light source, such as an LED, is present, the photodiode\'s positive terminal is activated, resulting in a corresponding change in the electric current that is carried through the output. The output is then used to control devices such as transistors or relays in order to complete a circuit.

The EL817(S1)(TU)-G is designed with a variety of protection mechanisms, which prevent it from being damaged during operation. These mechanisms include: light intensity overload protection, output short-circuit protection, logic circuit protection, and reverse voltage protection.

Conclusion

The EL817(S1)(TU)-G is a versatile and reliable optoisolator that can be used in a variety of applications. Its technical specifications, such as its low dark current and transfer ratio, coupled with its protection mechanisms, ensure it can withstand hazardous environments. This, combined with its working principle of detecting changes in light intensity, makes the EL817(S1)(TU)-G an attractive option for any optoisolator application.

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