4N25M-V

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The 4N25M-V optoisolator is a transistor, photovoltaic output optoisolator made up of an infrared light-emitting diode optically coupled to a photosensor. This optoisolator is specifically designed for applications requiring very low drive current and high isolation voltage. It offers high electrical isolation, high noise immunity and low crosstalk.

The 4N25M-V optoisolator is ideal for use in systems with power or signal line isolation requirements. It is commonly used in applications such as driving DC or AC load, low frequency switching, industrial automation, and process control. It is also used in data transmission and interface isolation, communications and switching, power control, and signal sensing applications.

The internal components of the 4N25M-V optoisolator consist of an infrared light-emitting diode, a photo-sensor, a light buffer and two isolated power output elements (diode and transistor). The infrared light-emitting diode transmits modulated light to the phototransistor. The phototransistor amplifies the incoming light signal and controls the output voltage. The light buffer is a special device between the phototransistor and the output elements that provides a soft turn-on of the output voltage.

The nominal output voltage of the 4N25M-V optoisolator is 6V while the maximum output voltage is 20V. The device offers a current transfer ratio of 400:1 at 3mA input drive current. The transistor output is rated up to 500mA while the diode output is rated up to 2A. The isolation voltage ratings of this optoisolator is 500Vrms. It has an operating temperature range of -30 to 110°C and a storage temperature range of -40 to 150°C.

In summary, the 4N25M-V optoisolator is a versatile optoisolator that offers excellent electrical isolation, high noise immunity, low crosstalk and low drive current requirements. It is ideal for applications requiring power or signal line isolation such as driving DC or AC load, low frequency switching, industrial automation, process control, data transmission and interface isolation, communications and switching, power control, and signal sensing applications. It is available in various versions for different voltage, current, isolation, and power ratings.

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