MOC81123SD

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Number of Channels:	1
Voltage - Isolation:	5300Vrms
Current Transfer Ratio (Min):	50% @ 10mA
Current Transfer Ratio (Max):	--
Turn On / Turn Off Time (Typ):	4.2µs, 23µs
Rise / Fall Time (Typ):	3µs, 14µs
Input Type:	DC
Output Type:	Transistor
Voltage - Output (Max):	70V
Current - Output / Channel:	--
Voltage - Forward (Vf) (Typ):	1.15V
Current - DC Forward (If) (Max):	90mA
Vce Saturation (Max):	400mV
Operating Temperature:	-55°C ~ 100°C
Mounting Type:	Surface Mount
Package / Case:	6-SMD, Gull Wing
Supplier Device Package:	6-SMD

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Optoisolators are electronic devices used to provide electrical isolation between two or more circuits. The MOC81123SD is a type of optoisolator known as a transistor, photovoltaic output optoisolator, and can be used in a range of different applications. This article will discuss the field of applications of the MOC81123SD, as well as its working principle and construction.The MOC81123SD is a small, surface mount optoisolator which is capable of isolating signals of up to 8V DC. It is commonly used for digital isolation in applications such as motor speed controllers, industrial logic control circuits, and personal computer systems. The device features a 5mm through-hole plastic case with an open drain N-channel MOSFET output stage, allowing it to be used in both shallow and deep recesses, or in high density printed circuit boards.The MOC81123SD is designed such that the input signal passes through an infrared LED and photodetector, which creates electrical isolation between the two circuits. As the input signal is sent through the LED, a current is generated in the diode and the light emitted from the LED is detected by the photodetector, creating the secondary electrical signal.The working principle of the MOC81123SD can be broken down into two components. First, the LED diode and photodetector are responsible for providing the electrical isolation of the two circuits, allowing the MOC81123SD to function as an isolated switch. Second, the device uses gain amplification of the photo-current generated by the photodetector in order to produce a voltage level shift, which in turn helps generate a larger output to drive an external load or device.The main components behind the MOC81123SD optoisolator are the LED diode and photodetector, which allow for electrical isolation between the two circuits. The LED is connected to the signal voltage, while the photodetector is connected to the output circuit. As the input voltage changes, the LED diode emits light which is detected by the photodetector, thus generating a current in the photodetector which then drives the output signal.The MOC81123SD is a reliable, cost-effective optoisolator with a number of advantages in applications such as motor controllers, logic control circuits, and personal computer systems. The device’s small size and through-hole plastic package allow for easy installation, while its ability to provide electrical isolation between circuits makes it an ideal choice for digital signal isolation applications. Additionally, the MOC81123SD’s gain amplification of photo-currents helps generate a larger output current, thus allowing it to drive an external load or device. Overall, the MOC81123SD is a reliable, cost-effective optoisolator which is ideal for a number of digital signal isolation applications. Its small size, robust construction, and ability to reliably provide electrical isolation between two or more circuits make it a suitable choice in a range of different applications.

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