PC452

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Number of Channels:	1
Voltage - Isolation:	3750Vrms
Current Transfer Ratio (Min):	1000% @ 1mA
Current Transfer Ratio (Max):	--
Turn On / Turn Off Time (Typ):	--
Rise / Fall Time (Typ):	100µs, 20µs
Input Type:	DC
Output Type:	Darlington
Voltage - Output (Max):	350V
Current - Output / Channel:	150mA
Voltage - Forward (Vf) (Typ):	1.2V
Current - DC Forward (If) (Max):	50mA
Vce Saturation (Max):	1.2V
Operating Temperature:	-30°C ~ 100°C
Mounting Type:	Surface Mount
Package / Case:	4-SMD, Gull Wing
Supplier Device Package:	4-SMD

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Optoisolators - Transistor, Photovoltaic OutputOptoisolators are electrical components used to transmit a signal from one circuit to another while electrically isolating the two circuits, allowing them to operate independently. One type of optoisolator is the transistor output, photovoltaic output (PC452). It is a specialized component designed to pulse a transistor switch in response to incoming light or photo-voltaic signal.The PC452 optoisolator consists of two major components, an LED and a phototransistor. The LED is a miniature light source that illuminates when current passes through it. This light is directed to the phototransistor, a logic-level circuit, which amplifies the received signal from the LED and activates a transistor switch.The PC452 optoisolator is all housed in a four-pin package, with the two active components -- LED and phototransistor -- located at the top. The transistor is located at the bottom and is connected to the source and load by two pins, while the LED is connected to input and ground by the remaining two pins. The LED is the most important component of the optoisolator, as it is the source that emits the light signal that will activate the transistor switch. Depending on the intensity and duration of the received signal, the transistor switch will open or close. The impact of this single transistor switch on the two circuits connected to it is done without any electrical connection between them, allowing them to operate independently and safely.The primary use of the PC452 optoisolator is to isolate a low voltage, low power input signal from a higher power output circuit. For example, it is used when connecting a low voltage, low power control signal to a valve, motor, or other type of circuit that operates at higher voltage or current than the input signal can provide. The optoisolator provides electrical isolation between these two circuits, as well as a high degree of surge protection and noise immunity.In addition to isolating two circuits, the PC452 optoisolator can also be used as an analog to digital converter. Since it is sensitive to light levels, it can be used to measure and detect levels of light and convert it into a voltage signal. This signal can then be used to control other digital systems, such as a switch or other types of sensors that can be used to control an automated system.In summary, the PC452 optoisolator is an invaluable component when it comes to transmitting an electrical signal from one circuit to another while providing electrical and noise isolation. It consists of two major components, a LED and a phototransistor, that when combined—emit light in the form of an electrical signal when a current passes through. These signals can then be used to open and close a transistor switch, or as an analog-to-digital converter to control an automated system, depending on the application.

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