4N28M Isolators

Output Type:	Transistor 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):	500mV
Current - DC Forward (If) (Max):	80mA
Voltage - Forward (Vf) (Typ):	1.2V
Current - Output / Channel:	100mA
Voltage - Output (Max):	30V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	3µs, 3µs
Turn On / Turn Off Time (Typ):	--
Current Transfer Ratio (Max):	--
Current Transfer Ratio (Min):	10% @ 10mA
Voltage - Isolation:	500Vrms
Number of Channels:	1
Part Status:	Active
Packaging:	Tube

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Optoisolators - Transistor, Photovoltaic Output

Optoisolators are solid-state electronic components that are used in electrical engineering for isolating input and output in very high and very low voltage applications, as well as to transfer data safely between circuits. The 4N28M optoisolator is a device composed of both a phototransistor and photovoltaic diode, the combination of which is then used to create a photobiasing transistor. The 4N28M optoisolator is often used to connect circuits and prevent electrical noise and surges from interfering with electrical circuits.The 4N28M optoisolator consists of two parts: the emitter (photodiode) and the collector (phototransistor). The photodiode is a semiconductor component that converts photons of light energy into electrical current. The phototransistor, on the other hand, is a transistor with a wide base-collector junction which allows a light-induced bias to occur within the transistor. The combination of the two creates a photobiasing transistor, wherein the biased current created by the photodiode is used to control the current flow in the phototransistor.The 4N28M optoisolator works by using an input connection to the emitter (the photodiode) and allowing an output connection to the collector (the phototransistor). When the emitter receives an electrical signal, it emits photons of light energy, which are then detected by the collector. The collector then converts the light energy into a biased current, which it then amplifies and transmits to the output connection. The advantage of this type of optoisolator is that it completely isolates the input and output connections, so that no noise or surges can interfere with the current.The 4N28M optoisolator has a number of applications in a variety of fields, ranging from industrial process controls to home electronics. It is often used to connect digital circuits, such as microcontrollers and logic gates, as it allows for digital signals to be isolated from each other, which prevents interference and crosstalk. It can also be used to provide electrical isolation for motors, relays, and electromechanical devices. Additionally, the 4N28M can be used to protect equipment and data from voltage or current spikes.The 4N28M optoisolator is a valuable piece of engineering equipment that provides a cost-effective way of protecting sensitive electronic devices and circuits. Its ability to create a photobiasing transistor and isolate input and output connections prevents noise and surges from interfering, which makes it perfect for a variety of applications.

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