4N38SM

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Optoisolators are components which are meant to provide electrical isolation between two circuits. The 4N38SM component is an optoisolator with a transistor, photovoltaic output. This type of optoisolator provides differential optical isolation with excellent linearity and response time. They are typically used for interface applications.

The 4N38SM contains a gallium arsenide infrared emitter diode, a monolithic silicon phototransistor, and an 8-contact DIP (Dual in-line package). The 8-contact DIP includes a plastic body, which is constructed of UL 94V-0 rated flame retardant material, an integral optical lens, and a metal can which covers the optically isolated elements. The 4N38SM is a plastic dual-in-line package intended for surface mount applications, and it is commonly used by circuit designers for implementing safety isolation requirements.

The working principle of the 4N38SM optoisolator is pretty simple. It relies on light generated from the emitter diode to trigger the phototransistor, which is then used to interface two electrical circuits. When there is an input voltage, the emission diode starts to emit light which is then picked up by the phototransistor and its collector-emitter path turns on. This will cause current to flow through the phototransistor and, when a load such as a relay is connected, it will be actuated since the current through the phototransistor will start to flow through the relay.

The 4N38SM optoisolator has a wide range of applications including motor speed control, contactless switches, power regulation circuits, air pressure settings, coupling isolator and amplifier, household appliance controls, security equipment circuitry, magnetic field sensing, and logic interface controls. Generally speaking, its easy to use, high efficient performance, and reliable optical isolation makes it a popular choice for any circuit designer.

In conclusion, the 4N38SM optoisolator with transistor, photovoltaic output is an excellent choice for any type of application that requires electrical isolation. It is a reliable component with a wide range of applications and easy to use features. With its efficient performance and reliability, it is a popular choice for any circuit designer.

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