H11A4SM

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Optoisolators are devices which can isolate two parts of an electronic system electrically while providing a optical connection between them. One part sends a signal in the form of an optical signal, while the other part receives the information in an electrical signal. H11A4SM optoisolators offer enhanced performance for high speed applications and feature an integrated phototransistor output. The versatile H11A4SM optoisolator allows a wide range of signal in put voltage levels to be accurately amplified and converted into a proportional current or voltage output.

The H11A4SM optoisolator consists of a gallium arsenide infrared emitting diode (GaAs IRED) mounted in a five pin package. The device has a high input impedance of 10 MΩ to 15 MΩ typical., which ensures minimal current leakage when used as a signal source. The attractive performance features of this optoisolator include high speed response with excellent insulation characteristics, high input-to-output gain and low operating voltage. The H11A4SM optoisolator can be employed in applications that require galvanic isolation, including medical and manufacturing equipment.

H11A4 SM’s phototransistor output provides an enhanced dynamic range, giving increased performance for high speed switching applications. It has a low input voltage; typically 10 V reverse blocking voltage and up to 2.5A forward current rating, with current limited by mounting conditions. When the input pin is at a low voltage, H11A4 SM’s output is low. When the input voltage is higher, the current passes through the device and the output is high. The high speed switching capabilities of H11A4 SM offers improved reaction time and lower power consumption.

H11A4 SM optoisolators provide an effective solution to interface two different systems, controlling the transfer of signals between the two circuits, while maintaining electrical isolation. They offer a cost effective and reliable way to pass signals between circuits in applications that require fast switching and high voltage isolation or simply to provide a reliable electrical barrier. The H11A4SM optoisolator has been used for many years in various systems, such as motor controllers, switching power supplies, inverters and voltage regulators.

H11A4 SM optoisolators enable the transfer of signal information from an electrically powered device to an electronically powered device with the help of an optical channel. It eliminates the need for direct contact between the two systems, since the two devices are not electrically connected but are optically interconnected. When the input voltage is below the breakdown voltage of the device, the output is low. On the other hand, when the input voltage is greater than the breakdown voltage of the device, the H11A4 SM’s output is high.

The H11A4SM optoisolator is a versatile device, offering an ideal solution for applications which demand high speed switching, improved noise immunity, and superior insulation characteristics. Its integrated phototransistor output and high input impedance make it ideal for applications such as motor controllers, switching power supplies, inverters, voltage regulators and other such systems which require electrical isolation.

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