HMHA281R4

Output Type:	Transistor
Supplier Device Package:	4-Mini-Flat
Package / Case:	4-SOIC (0.173", 4.40mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 100°C
Vce Saturation (Max):	400mV
Current - DC Forward (If) (Max):	50mA
Voltage - Forward (Vf) (Typ):	1.3V (Max)
Current - Output / Channel:	50mA
Voltage - Output (Max):	80V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	3µs, 3µs
Turn On / Turn Off Time (Typ):	--
Current Transfer Ratio (Max):	600% @ 5mA
Current Transfer Ratio (Min):	50% @ 5mA
Voltage - Isolation:	3750Vrms
Number of Channels:	1
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Optoisolators - Transistor, Photovoltaic OutputOptoisolators, also known as optocouplers, are electrical components that link two electrically isolated circuits without the use of direct electrical conductors. This isolation prevents electricity from passing through the circuit from one side to the other, reducing the chance of electrical damage or interference between the two circuits. Optoisolators are commonly used in industrial settings to allow signals from circuits with different voltages or ground potentials to communicate with each other safely.The HMHA281R4 optoisolator is a type of photovoltaic optoisolator, specifically designed to enable electrical signals to travel between two circuits. It consists of an infrared light emitting diode (LED), a photosensitive device and an optically coupled output transistor. The LED emits light in the form of infrared rays, which is then absorbed by the photosensitive device. The absorbed light is converted into an electrical signal by the photosensitive device, which is then used to switch the output transistor. The output transistor can either be used to switch a load on or off, depending on the application requirements.The main advantages of the HMHA281R4 optoisolator are its high isolation voltage and small size. The isolation voltage is rated at 3kV, making it ideal for applications where a reliable electrical circuit is required for signal transmission. The small size also makes it ideal for applications where space is limited.The HMHA281R4 can be used in various applications including motor control, commercial and industrial lighting, security systems and telecommunications. In motor control, the optoisolator is used to provide an interface between the input signal and the output electrical power, allowing them to be connected without direct contact. This reduces the risk of electrical damage or malfunctions due to electrical shocks or short circuits. In commercial and industrial lighting, the optoisolator is used to provide an interface between the input signals and the output lighting, allowing them to communicate without direct contact. This reduces the risk of electrical damage or malfunctions due to electrical surges or shorts.In security systems, the optoisolator is used to provide an interface between the input and output field sensors, allowing them to detect intrusions without direct contact between them. This reduces the risk of electric shocks or malfunctions due to electrical surges or shorts. In telecommunications, the optoisolator is used to provide an interface between the input and output signals, allowing them to communicate without direct contact. This reduces the risk of electrical damage or malfunctions due to electrical surges or shorts.Overall, the HMHA281R4 optoisolator is an ideal solution for applications where reliable electrical circuits are required for signal transmission. Its small size and high isolation voltage make it ideal for use in environments where space is tight and a reliable electrical connection is needed. Its applications span across a range of industries, making it a valuable tool for any engineer or designer.

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