EL3012

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Optoisolators are becoming an increasingly popular type of isolation devices. EL3012 optoisolator is one of the optoisolators available in the market. It is a Triac output optoisolator with a photocoupler as the main component. This optoisolator is widely used to isolate and protect sensitive circuits from higher voltage electrical noise or unwanted signals.

EL3012 optoisolator is widely used in low-voltage AC switch control, such as controlling lighting, household appliances, and motor control. It is easy to use, has good isolation performance, and the isolation voltage reaches 6000VAC. It has an excellent response time and low forward voltage.

The working principle of EL3012 optoisolator is based on the physical phenomenon of “illuminated semiconductor”. When an electrical signal reaches the control end of the optoisolator, the LED will emit a certain level of light. The light is intercepted by the photodiode, which then produces a corresponding electrical signal that drives the output optically isolated Thyristor such as Triac, SCR, etc. This signal works like a switch, turning on and off the higher voltage devices.

The internal circuit of EL3012 optoisolator is mainly composed of a light emitting diode (LED), a photovoltaic array, a photosensitive controlled rectifier and a series damping impedance. The LED is coupled to the isolation side of the optoisolator, and its light is intercepted by the photovoltaic array on the drive side to generate voltage. This voltage drives the output thyristor to emit corresponding signals, thus realizing the control between the isolation side and the drive side.

In addition, EL3012 optoisolator has several external characteristics that make it a very useful device. These external characteristics include low coupling capacitance, fast response time, no distortion in the output current waveform, and wide operating temperature range. It has also been seen that the EL3012 can work perfectly even in high voltage (up to 6KV) or low power consumption.

When used in applications, EL3012 optoisolator should consider four aspects: i) the circuit should be well-grounded, otherwise it will interfere with the reliability of signal transmission; ii) the power supply voltage should be strictly limited to the rated voltage; iii) ensure the normal air circulation of the ambient temperature to ensure the normal operation of the device; iv) pay attention to the condition of the connecting wires, especially the anti-interference of the communication wires.

In conclusion, EL3012 optoisolator is an effective isolation device applied in various fields. With its high-quality internal and external characteristics, it is widely used in low-voltage AC switch control. And its isolation and protection enable it to be used in a variety of situations. Its working principle is based on the physical phenomenon of the illuminated semiconductor, which helps it to control various outputs such as Triac, SCR, etc.

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