4N48U

Output Type:	Transistor with Base
Supplier Device Package:	6-LCC (6.22x4.32)
Package / Case:	6-SMD, No Lead
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 125°C
Vce Saturation (Max):	300mV
Current - DC Forward (If) (Max):	40mA
Voltage - Forward (Vf) (Typ):	1.5V (Max)
Current - Output / Channel:	--
Voltage - Output (Max):	45V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	20µs, 20µs
Turn On / Turn Off Time (Typ):	--
Current Transfer Ratio (Max):	--
Current Transfer Ratio (Min):	100% @ 2mA
Voltage - Isolation:	1000VDC
Number of Channels:	1
Part Status:	Active
Packaging:	Bulk

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Optoisolators - Transistor, Photovoltaic OutputOptoisolators, also known as optocouplers, offer a form of electrical isolation between input and output circuits, usually by physically isolating the two components from each other. Optoisolators, or optical couplers, integrate light-emitting diodes (LEDs) and photodetectors in a single package, enabling signal communication and transfer with minimal current flowing through the electrical isolation barrier between them. Transistor-based optoisolators and photovoltaic optoisolators are two common types.The 4N48U optoisolator is a photovoltaic output optcoupler. This device features a 6-pin dip package, and high isolation voltage with 2500VRMS. It is an ideal solution for applications including telecommunication, process control, building automation, factory automation, lighting control, automotive electronic technologies, and more.The 4N48U optoisolator consists of a gallium arsenide infrared LED embedded in a molded package, together with a silicon planar photovoltaic cell. It is designed to transfer electrical signals from one circuit to another while maintaining a high level of electrical isolation to prevent interference. From an electrical standpoint, the 4N48U optoisolator consists of two distinct sections: the input section and the output section. The input section, made up of the LED, is powered by the electrical energy supplied by the system’s input circuitry, and the output section is made up of the photovoltaic cell.The operation of the 4N48U optoisolator is relatively straightforward. When the input circuitry turns the LED on at its anode, electrons of current flow through the LED’s cathode and emit photons of infrared light. This infrared light is detected by the photovoltaic cell and induced electrons of current flow out of the device’s output electrode, providing a current-driven load.As the photovoltaic cell is reverse biased, this produced voltage cause a constant current of electrons to flow from the LED to the output section of the optoisolator. The 4N48U optoisolator achieves high voltage isolation by utilizing the physical separation provided between the input and output sections, though it is usually reinforced with additional insulation components such as ceramics or gas-filled cells.To achieve the desired current transfer, the 4N48U optoisolator is designed with low power consumption, wide operating temperature range, and superior on-state resistance. In addition, the device does not require any external components and is equipped with reverse voltage protection. In terms of resistance to environmental noise and degradation, the 4N48U optoisolator is especially well-suited for low-frequency signals such as analog input signals up to 1 MHz. It also features a high common-mode rejection ratio and low insertion loss, thanks to its high-efficiency LED and photovoltaic cell.Overall, the 4N48U optoisolator provides reliable electrical isolation with minimal current flow and superior resistance to environmental noise and degradation. It is an ideal solution for applications such as telecommunication, process control, building automation, factory automation, lighting control, automotive electronic technologies, and more.

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