EL816(S)(B)(TU)

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Optoisolators are electronic components that electrically isolate one side of a circuit from another. This is done using an optically coupled LED-diode pair, allowing an electric signal to be transferred across the barrier of isolation. The EL816 family is an opto-isolator series designed to break isolation between two circuits using a low power transistor-photovoltaic (TU) output. The applications for this device are far-reaching.

The El816 family of opto-isolators are typically used in industrial applications and motor control systems. They are popularly employed in situations that require high electrical insulation. At 500VDC or 1.0kVAC (Volt-Amps), these devices offer superior isolation when compared to other opto-isolator designs. Beyond the high voltage insulation this series offers, it also excels in a number of additional areas.

The El816 opto-isolator family have very low power consuming transistors to drive their LED light sources. Depending on the model, these devices operate on a supply current of 8mA or less. In addition, the collector-emitter breakdown voltage of the device is very low, usually around 10mV. This is because of its dielectric strength, which offers high temperature durability and a greater electrical insulation factor.

The LED light source is the core of the EL816 opto-isolator and serves to bridge the gap between the sending and receiving sides of the transistor-photovoltaic output circuit. The LED, on the input side is powered by a current of around 5mA up to 40mA, depending on the model in use. The current is then converted into a voltage by the photodiode which is connected to the emitter and the collector of the transistor output. The photodiode is used to convert the optical signal, resulting from the LED, into an electrical voltage.

The output transistor is typically an NPN type with a low saturation voltage, making it suitable for use in low power electronics. This transistor is employed to handle the output voltage generated from the photodiode. It is also used to drive the electrical load connected to the opto-isolator. The 500V physical insulation between the circuits offers superior isolation and protection to the circuit from any external noise that may be present.

Overall, Optoisolators have become a standard component in many of today’s electronic products. The EL816 opto-isolator family is highly suited for applications that require electrical isolation between two circuits. It uses a low power transistor-photovoltaic output to provide an electrical isolation of 500V, along with high temperature durability and a low power LED input for signal transmission. This combination of features makes the EL816 ideal for industrial, motor control and low power electronics applications.

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