H11A4VM

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Optoisolators are used to provide electrical insulation between two circuits, while also allowing signal transmission between them. By combining a light-emitting diode (LED) and a photodetector, these devices can ensure a secure and robust connection between a controller and a peripheral. H11A4VM optoisolators are among the most popular available, and combine an LED and a phototransistor.

The H11A4VM optoisolator operates on the basic principle of converting light into electrical energy. When the LED inside the device is activated, it emits a beam of light which is received by the phototransistor. The transistor, which is sensitive to light, then converts the optical signal back to an electrical one, providing an output signal from the device. This output is isolated from the input, as it has been converted from light into electricity, and no current flows directly between the two circuits.

Due to its high isolation performance, wide voltage range and industry standard dimensions, the H11A4VM optoisolator is ideal for a wide range of applications. Its ability to transfer signals between two circuits while maintaining electrical isolation makes it highly suitable for applications in medical and industrial control systems. It can be used to control relays, valves and motors, as well as for checking the operation of safety devices. It is also suitable for applications where a signal needs to be transmitted between two isolated pieces of equipment, or when an AC signal needs to be converted to a DC one.

In terms of its physical specifications, the H11A4VM is 30.6mm x 13.90mm x 11.10mm in size, with an operating temperature of -45 to 85°C. It has a max forward current of 20mA, and a max reverse voltage of 0.5 volts. Its max isolation voltage is 4000Vrms (4kVrms), and its response time is 4-15ms (depending on the size of the forward current).

The H11A4VM optoisolator combines an LED and a phototransistor inside a single package, allowing signals to be transferred between two circuits while providing high levels of electrical insulation. This makes it suitable for a wide range of applications, including medical, industrial and safety monitoring systems. Its small size, wide voltage range and high isolation voltage make it an ideal choice for applications where space and performance are a factor.

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