4N26FM

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The 4N26FM is a optoisolator, otherwise known as a photocoupler, which provides electrical isolation between components in a system, which prevents undesirable electrical noise from electro-magnetic interference, or EMI, from interfering with the operation of sensitive circuitry. The optoisolator works by a light-emitting diode (LED) emitting a beam of light onto a phototransistor. In this case, the 4N26FM is a transistor, photovoltaic output optoisolator.

Application Field

Optoisolators are found in a wide variety of applications including motor drives, power control systems, pulse motor controllers, and test equipment. The 4N26FM transistor, photovoltaic output optoisolator is used, primarily, in circuits where cost is a priority and low power is involved. This optoisolator is well suited for many low-power applications such as communication lines, peripheral interface adapters, remote control systems, and pulse shaping. Additionally, the 4N26FM can be used as a power switch in high-voltage AC circuits.

Working Principle

The 4N26FM optoisolator operates by converting light energy into electrical output. The optoisolator contains a light-emitting diode (LED) which converts electrical energy into light. When current passes through the LED, it produces light. This light is picked up by a phototransistor which has a base-emitter junction between two wide-gap semiconductors. The phototransistor produces a current when the LED\'s light is absorbed. This current is used to control a load or provide an electrical output signal. When the LED is not illuminated, the phototransistor is not conducting, and no output is produced.

The 4N26FM offers several advantages over other optoisolators. It has a low power consumption, and it has a fast switching speed which minimizes noise and interference. Additionally, the 4N26FM has a wide dynamic range, so it can be used in a variety of applications. Finally, the 4N26FM has a very low distortion level, which ensures that signals are accurately transmitted.

The 4N26FM optoisolator is a cost-effective solution for many electrical applications. Its low power consumption, fast switching speed, wide dynamic range, and low distortion level make it a popular choice for many applications where electrical noise is a concern.

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