4N313SD

Output Type:	Darlington with Base
Base Part Number:	4N31
Supplier Device Package:	6-SMD
Package / Case:	6-SMD, Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 100°C
Vce Saturation (Max):	1.2V
Current - DC Forward (If) (Max):	80mA
Voltage - Forward (Vf) (Typ):	1.2V
Current - Output / Channel:	150mA
Voltage - Output (Max):	30V
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:	5300Vrms
Number of Channels:	1
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Optoisolators - Transistor, Photovoltaic Output

Optoisolators are devices used to electrically isolate two circuits, allowing for an electrical isolation of two separate systems. This is done using a device called a 4N313SD, which is a four pin, transistor photovoltaic output optoisolator. This device provides the required isolation between input and output circuits, which is useful in a number of applications.The 4N313SD optoisolator is composed of two distinct components. The first is a silicon NPN transistor and the second is a photovoltaic output module. The NPN transistor is a four layer semiconductor which is capable of amplification and current switching. The photovoltaic output module consists of an infrared LED and a photo-resistor.One of the major advantages of an optoisolator like the 4N313SD is its ability to eliminate ground loops that happen when two separate systems are combined. This is accomplished by completely electrically isolating the input and output circuits, so that one circuit doesn\'t affect the other. This is especially useful in applications where a camera or other sensitive electric equipment is connected to a system that may have noise or other undesirable signals.The 4N313SD optoisolator also provides high current transmissibility from low power input and output signals. This makes it useful in applications such as linear device control, medical instrumentation, and switching mode power supplies. In addition, the 4N313SD has an integrated circuit which allows the user to connect multiple optoisolators together for increased current transmissibility. This can be beneficial in applications where multiple high power devices need to be controlled.In operation, the 4N313SD optoisolator works by having the photo-resistor detect light emitted from the infrared LED. When the LED is turned on, the photo-resistor provides a signal which is then amplified by the NPN transistor and sent to the output. If the LED is turned off, the signal is blocked and no output is sent.The 4N313SD optoisolator is especially useful for maintaining the isolation between two circuits. When compared to a relay, the optoisolator provides a more compact and energy efficient solution. It is also less susceptible to electromagnetic interference, as there are no moving parts. In short, the 4N313SD device provides superior isolation and signal handling capabilities for applications where isolation and signal transmission is needed.

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