EL3H7(A)(TA)-VG

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Optoisolators are an important part of the electrical engineering industry. The purpose of an optoisolator is to provide isolation between two circuits, typically a high voltage or high current circuit and a low voltage or low current circuit. EL3H7 (A) (TA)-VG optoisolators are a type of optoisolator that use a transistor, photovoltaic output. This article will discuss their application field and working principle.

Application Field

EL3H7 (A) (TA)-VG optoisolators are used in a variety of industries. The most common applications include data processing systems, telecommunications systems, PLCs, industrial controllers, instrumentation, automotive systems, and similar environments that require isolation between high voltage/current circuits and low voltage/current circuits. In these application fields, EL3H7 (A) (TA)-VG optoisolators can provide a reliable and cost-effective isolation solution.

Working Principle

EL3H7 (A) (TA)-VG optoisolators work by using a photovoltaic cell to convert an electrical signal that is sent from the low voltage/current circuit into an optical signal. This optical signal is then sent through an optical fiber or other medium to the high voltage/current circuit, where it is converted back into an electrical signal. The main advantage of this type of optoisolator is that it can provide full electrical isolation between the two circuits, while still allowing data to be communicated between them.

The photocell used in the EL3H7 (A) (TA)-VG optoisolator consists of two elements, a photodiode and a transistor. The photodiode is used to detect the optical signal that is sent from the low voltage/current circuit. When the light signal is received, it causes a current to flow through the photodiode, which is then fed to the transistor. The transistor amplifies the current and sends an electrical signal to the high voltage/current circuit, completing the isolation process.

Conclusion

EL3H7 (A) (TA)-VG optoisolators are an important type of optoisolator that uses a transistor, photovoltaic output. These optoisolators are used in a variety of application fields, including data processing systems, telecommunications systems, PLCs, industrial controllers, instrumentation, automotive systems, and similar environments. Their working principle involves using a photodiode and a transistor to convert an electrical signal into an optical signal and vice versa, providing full electrical isolation between the two circuits.

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