H11AA4SM

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Optoisolators are electronic components that isolate two electrical circuits while allowing them to communicate with each other. The H11AA4SM optoisolator is a transistor, photovoltaic output optoisolator designed to provide efficient optical isolation between two circuits.

The H11AA4SM optoisolator is designed to be a high performance optical isolator for various industrial applications. It consists of an infra-red emitting diode (IRED) and a photovoltaic detector integrated in a hermetically sealed 6-pin flat plastic package. The IRED produces a narrow infrared beam focused on the photodetector, allowing it to detect small changes in input voltage or current.

H11AA4SM provides an excellent combination of high isolation voltage, temperature stability and low noise. The maximum on-state collector current is 400mA with a continuous collector-to-emitter voltage of 80V. It also features a minimum data rate of 5 Mb/s, making it suitable for high speed signal transmission.

The working principle of the H11AA4SM optoisolator is based on the current flow from the emitter to the collector terminal of the transistor. When an input voltage is applied to the emitter, current begins to flow through the LED and is detected by the photodetector. This causes the voltage across the collector-emitter terminals of the transistor to increase, which in turn switches on the transistor and allows the current to flow from the collector to the emitter.

The H11AA4SM can be used in a variety of applications such as isolation of receiver circuits, motor control, relay control, AC/DC switching, switching of currents up to 400mA, and telecommunications systems. This optoisolator can also be used as a high voltage protect device to isolate sensitive circuits from high voltage and electrical noise.

In conclusion, the H11AA4SM optoisolator is a reliable and efficient device for providing electrical isolation between two circuits. Its high isolation voltage, temperature stability and low noise make it suitable for use in various industrial applications. Its working principle is based on the current flow between the emitter and collector terminals of the transistor, allowing it to switch on or off depending on the input voltage. This makes it a versatile optoisolator for a variety of applications.

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