4N28X

Output Type:	Transistor with Base
Supplier Device Package:	6-DIP
Package / Case:	6-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 100°C
Vce Saturation (Max):	500mV
Current - DC Forward (If) (Max):	60mA
Voltage - Forward (Vf) (Typ):	1.2V
Current - Output / Channel:	50mA
Voltage - Output (Max):	30V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	2µs, 2µs
Turn On / Turn Off Time (Typ):	--
Current Transfer Ratio (Max):	--
Current Transfer Ratio (Min):	10% @ 10mA
Voltage - Isolation:	5300Vrms
Number of Channels:	1
Part Status:	Active
Packaging:	Tube

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Optoisolators - Transistor, Photovoltaic Output

Optoisolators, or optocouplers, are isolation components used in electrical and electronic systems. There are several types of optoisolators, including those with a transistor output, such as the 4N28X. This compact, versatile component allows for efficient signal transmission between input and output components, without the need for direct electrical contact between them.

What Is the 4N28X?

The 4N28X is a 4-pin, field-effect transistor (FET) optoisolator. It has an integrated photodiode optically coupled to a FET transistor. This type of optoisolator is used to isolate a low voltage input circuit from a high voltage output circuit. The 4N28X has a fast switching speed and a high CTR (current transfer ratio) rating.

4N28X Application Field and Working Principle

The 4N28X optoisolator is commonly used in control systems, switching power supplies, motor drives, and other high voltage applications. It can be used to provide electrical isolation between circuits, allowing for signals to be transmitted between them without directly connecting the two.The functioning of the 4N28X optoisolator depends on its optoelectronic component, which consists of an LED emitter and a photodiode detector. When an electrical signal is received at the input, the LED generates light which is then detected by the photodiode on the output, creating an electrical signal.When the optoelectronic component is energized, the photodiode generates a flow of current which is then amplified by the transistor output. The electrical current is then passed to the output circuit, allowing for signal transmission without direct electrical contact between the two.

Conclusion

The 4N28X optoisolator is a versatile and efficient isolation component used in a variety of high voltage applications. It is an indispensable tool for providing electrical isolation between circuits and allowing for signal transmission without the need for direct electrical contact between components. With its fast switching speed and high CTR rating, the 4N28X is an ideal optoisolator for protecting electronic systems from interference and noise.

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