4N31M

Output Type:	Darlington with Base
Supplier Device Package:	6-DIP
Package / Case:	6-DIP (0.400", 10.16mm)
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 100°C
Vce Saturation (Max):	1.2V
Current - DC Forward (If) (Max):	60mA
Voltage - Forward (Vf) (Typ):	1.2V
Current - Output / Channel:	--
Voltage - Output (Max):	55V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	--
Turn On / Turn Off Time (Typ):	5µs, 40µs (Max)
Current Transfer Ratio (Max):	--
Current Transfer Ratio (Min):	50% @ 10mA
Voltage - Isolation:	5000Vrms
Number of Channels:	1
Part Status:	Active
Packaging:	Tube

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Optoisolators - Transistor, Photovoltaic Output

Optoisolators are a type of electrical device used to isolate input circuits from output circuits. An optoisolator’s primary function is to help protect circuits from electrical noise, overvoltages, and other hazardous conditions. Optoisolators are most commonly used in the protection of communications devices, optical fiber networks, HVAC systems, and medical devices.The particular optoisolator used in this discussion is the 4N31M. It is one of many optoisolators available on the market and one of a sub-class within the broad category of optoisolators known as transistor, photovoltaic output.An optoisolator is composed of two parts; the optical part and the electrical part. The optical part typically includes an infrared light source such as an LED, while the electrical part typically includes a photovoltaic cell and the output transistor. In the case of the 4N31M, the optical part consists of an LED, while the electrical part consists of a photovoltaic cell and a lateral MOSFET.The 4N31M works by using the LED component to emit infrared light, which is picked up by the photovoltaic cell. The photovoltaic cell then converts the light into electrical energy, which is then relayed to the MOSFET transistor. The transistor then amplifies the electrical energy to produce a signal, which can then be used to drive a variety of outputs, such as relays, transistors, or other electronic components.The 4N31M optoisolator is used in a variety of applications. For example, it is often used in safety-related products such as fire alarm control systems or medical devices. It is also used in communication electronics, such as modems, routers, and DSL modems. Additionally, it can be used to control a variety of other circuits, such as LED indicators or motor control circuits.One of the greatest benefits of optoisolators such as the 4N31M is their ability to isolate two separate circuits. This helps protect the input circuit from potentially hazardous output voltages and helps protect the output circuit from electrical noise. This makes optoisolators ideal for use in applications such as medical devices, industrial electronics, automation, and aerospace.In conclusion, the 4N31M optoisolator is a type of transistor, photovoltaic output optoisolator. It consists of an LED and a photovoltaic cell, along with a lateral MOSFET transistor, and provides a convenient means of isolating two separate circuits. It is used in a variety of applications, including communications, safety products, and motor control. And its ability to provide electrical isolation makes it ideal for applications such as medical devices, industrial electronics, automation, and aerospace.

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