EL3021S(TB)

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Optoisolators, also called optocouplers, photo couplers, photocouplers and optical isolators, are devices used to electrically isolate two connected circuits, while allowing them to transmit digital or analog signals to each other. The EL3021S(TB) is a type of optoisolator, specifically a triac, SCR output. It uses an optical coupling technique to achieve this isolation and can provide reliability and safety for a wide range of applications.

The EL3021S(TB) features a high current handling capability of up to 250mA and a load voltage rating of up to 800V. It also has a UVLO (Under Voltage Lock Out) function which prevents the output being triggered until the input voltage is above the UVLO specified level. This function ensures reliable performance and safety, allowing the optoisolator to be used even in harsh industrial environments.

The EL3021S(TB) is suitable for applications requiring the switching of Triac, SCR loads. These include AC or DC motor control, incandescent lamp dimmers, lighting controls, heaters, and fluorescent and HID lamp dimmers. The wide load voltage and current ratings, as well as the high level of isolation provided, make the EL3021S(TB) an excellent choice for these and other applications.

The working principle of the EL3021S(TB) is based on the transfer of light energy between the input and output circuits. The device contains an LED which is connected to the input side of the circuit and an IC photodetector on the output side. A plastic housing encloses both components. When a voltage is applied to the input side, it causes the LED to emit light which is focused onto the detector. The detector then turns the light energy into current, which is used to drive the output TRIAC or SCR.

In addition to providing isolation, the EL3021S(TB) also offers a high level of temperature stability. The device has a -40°C to + 90°C temperature range and a -25°C to +105°C storage temperature range. This ensures reliable performance in both high and low temperature environments.

The EL3021S(TB) is also available in combination with an isolation transformer and is designed for use in both TRIAC and SCR applications. It has a maximum input frequency rating of 300kHz and is available in several package options, including surface mount and through hole. This makes it ideal for use in a variety of industrial applications.

The EL3021S(TB) triac and SCR optoisolator is a reliable and safe solution for applications requiring the switching of TRIAC or SCR loads. Its wide current and load voltage ratings, as well as its temperature stability, make it an excellent choice for a variety of industrial applications. It is also available in several package options, making it easy to find a solution that meets the specific needs of different applications.

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