OPIA404BTRE Isolators

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Optoisolators are electrical components which are used to electrically isolate two circuits in order to achieve electrical safety, signal transmission or power switch. The most commonly used type of optoisolator is transistor-photovoltaic output (OPIA404BTRE), which is widely used in the field of automation control and medical instrumentation.

The OPIA404BTRE optoisolator is composed of an infrared LED, a detector diode and an output transistor. The LED emitter emits infrared light when it is turned on. The detector diode will detect the infrared light and convert it into electrical signals that can drive the output transistor to pass current. The three elements are isolated from each other electrically, so that the input circuit and the output circuit are optically coupled.

As the working voltage of the OPIA404BTRE optoisolator is 5V, it is suitable for low-power circuits. The switching time of the optoisolator is also very short, which is only a few hundred microseconds. It is characterized by high speed, high power and long service life. It can maintain the output signal stability even under various input signal levels. Its heat dissipation is good, and the temperature increase at full load is only about 0.1 ℃ per watt.

The OPIA404BTRE optoisolator, as a so-called "optical isolator", can be used to realize communication and control between various circuits with different power levels. For example, a low-level circuit or an isolated logic circuit is usually used as the input to the optoisolator; and a medium-level circuit, a relay, or a power transistor can be used to realize the output. It can also be used to detect the current state. For example, it can be used to detect the phase current of an AC voltage and then feed back a warning signal.

In addition, the OPIA404BTRE optoisolator can be used for feedback control and adjustment, line protection, motor speed regulation and so on. It can effectively reduce the interference and noise of various circuits, reduce the response time, improve the dynamic performance, and reduce the cost. For applications with strict safety requirements, the optoisolator can isolate hazardous high-power circuits from the control circuit, thus improving the safety of the circuit.

The working principle of OPIA404BTRE optoisolator can be concluded in one sentence: When the infrared LED is turned on, it will emit infrared light that will be detected by the detector diode; then the detected signal will drive the output transistor to pass current. The three components are isolated from each other to ensure electrical safety. Its versatility and performance make it widely used in many electronic circuits.

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