4N45#500

Output Type:	Darlington with Base
Base Part Number:	4N45
Supplier Device Package:	6-SMD
Package / Case:	6-SMD, Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Vce Saturation (Max):	--
Current - DC Forward (If) (Max):	20mA
Voltage - Forward (Vf) (Typ):	1.4V
Current - Output / Channel:	60mA
Voltage - Output (Max):	7V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	--
Turn On / Turn Off Time (Typ):	5µs, 150µs
Current Transfer Ratio (Max):	1000% @ 10mA
Current Transfer Ratio (Min):	200% @ 10mA
Voltage - Isolation:	3750Vrms
Number of Channels:	1
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Optoisolators - Transistor, Photovoltaic OutputOptoisolators, also known as photocouplers and optical isolators, are electronic components made of a light-emitting diode (LED) and a photo detector which together create a bidirectional information transfer across a physical boundary. Optoisolators provide electrical isolation between two circuits while transferring signals from one to the other. They are mainly used to provide protection against electrically noisy environments, noise-generated ground currents, and electromagnetic interference (EMI).The 4N45#500 optoisolator is one type of optoisolator, and it is a transistor, photovoltaic output. This optoisolator is composed of a GaAs infrared LED and a phototransistor separated by a 4mm gap. It has an insulation voltage of 5000VRMS, high isolation resistance up to 1012 ohms, operates over a wide temperature range from - 25C to + 70C, and features a compact surface-mount SMD package.The optoisolator provides electrical isolation between an input circuit and an output circuit in an electronic system. The input circuit is composed of the LED and the output circuit is composed of the phototransistor. The output transistor in the 4N45#500 will conduct when the LED is triggered and supplied with an appropriate current. This LED current can be supplied by an independent power source, or can come from a signal source in the input circuit. The output current in the transistor is available to power any circuit, or to drive additional optoisolators.The working principle of the 4N45#500 optoisolator is based on the principle of photovoltaic effect. When the LED is activated, it emits a beam of photons in the infrared spectrum. This beam of photons is then absorbed by the phototransistor, causing it to produce a current through the output transistor. This current can then be used to drive an output device or activate additional components.The 4N45#500 optoisolator is widely used in applications such as fieldbus systems, switching circuits, industrial power converters, load capacity regulation, and temperature control and measurement. It is also an ideal solution for applications requiring reliable electrical isolation between the input and output circuits. It also provides a nice solution for applications that require a higher isolation voltage than what is available from other optoisolators.In conclusion, the 4N45#500 optoisolator is a reliable, industrial-grade optoisolator with a wide range of applications. It is an ideal solution for applications requiring electrical isolation between two circuits while transferring signals from one to the other. With its wide operating temperature range and its high insulation voltage, it can provide reliable performance in a variety of environments.

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