Series:	--
Packaging:	Bulk
Part Status:	Obsolete
Number of Channels:	1
Voltage - Isolation:	1000VDC
Current Transfer Ratio (Min):	60% @ 10mA
Current Transfer Ratio (Max):	--
Turn On / Turn Off Time (Typ):	--
Rise / Fall Time (Typ):	20µs, 20µs (Max)
Input Type:	DC
Output Type:	Transistor with Base
Voltage - Output (Max):	40V
Current - Output / Channel:	50mA
Voltage - Forward (Vf) (Typ):	1.5V (Max)
Current - DC Forward (If) (Max):	40mA
Vce Saturation (Max):	300mV
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Through Hole
Package / Case:	TO-78-6 Metal Can
Supplier Device Package:	TO-78-6

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Optoisolators - Transistor, Photovoltaic Output

Optoisolators, or optical isolators, are electronic circuits that use light to transfer electrical signals between circuit elements. The isolation of the two circuits prevents the exchange of electric current, which can otherwise cause unwanted interference between them. The circuit isolation is achieved by connecting an optical coupling device between the input and output elements. The component is made up of an emitter, which is usually an LED, and a photoreceptor, which is usually a transistor.The most common type of optoisolator is the transistor-photovoltaic output type, also known as JAN4N23. This type of optoisolator has an LED on one side, a phototransistor on the other side, and a clear window between them. Light from the LED enters the window and is then focused onto the base of the phototransistor. When the receiving transistor receives the light, it turns on, allowing current to flow through it to the output circuit.The working principle of the JAN4N23 optoisolator is based on the refractive index of light, which is the index of the light passing through the transparent medium. The light emitted from the LED and focused onto the base of the phototransistor is called a “refraction” beam. This beam is modulated to control the current flowing through the output transistor.The output of an optoisolator can be used to switch various devices, such as relays, contactors, and switches. It can also be used to control the speed and operation of motors, and serves as an interface between digital and analog circuitry.Optoisolators can also be used for signal isolation. When two different circuits that transmit electrical signals are connected, they will sometimes interfere with each other, causing undesirable effects. By decoupling the circuits with an optoisolator, any unwanted signals are blocked and the desired signals can be transmitted without interference. This is especially useful in industrial and medical applications, where safety and accuracy are paramount.Optoisolators can also be used to protect sensitive electronic components from electrical overloads. They provide a safety barrier between the device and the overload, preventing any further damage from occurring.In conclusion, optoisolators are an invaluable tool for safely and accurately transferring electrical signals. The JAN4N23 optoisolator, in particular, is used for switching various devices, signal isolation, and providing overload protection. The components are simple and reliable, making them easy to assemble and deploy.

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