HMHA281R3V

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Part Status:	Obsolete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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Introduction: Optoisolators - Transistor, Photovoltaic Output are optical devices designed to prevent electrical shocks and protection of sensitive electronics by insulating high voltage inputs from the protected circuits. The optoisolator is composed of a photosensitive component, usually a light-activated transistor or optotransistor, and an output transistor. The HMHA281R3V is an optoisolator of this type that combines a signal LED with a field effect transistor in a single surface mount device. It is ideally suited for isolating signals in high voltage applications. This article provides an overview of the HMHA281R3V’s application field and working principle.Application Field: The HMHA281R3V is designed for applications that require reliable electrical isolation between circuits operating at different power levels, such as those commonly used in communications, industrial control, and medical equipment. The optoisolator provides excellent signal transmission while providing enhanced safety by eliminating any direct electrical connection between the input and output circuits.Working Principle: The HMHA281R3V optoisolator consists of a photosensitive element that absorbs incoming light and activates an electrical current in the output transistors. The light source may be visible or near-infrared light detectable by the photosensitive element. The intensity of the incoming light is converted to an electrical current which activates the output transistor, thereby providing isolation between the input and output circuits.Advantages of the HMHA281R3V: The HMHA281R3V provides excellent electrical isolation between the input and output circuits while ensuring reliable signal transmission. Its single-surface mount design allows it to be easily integrated into existing systems, and its built-in LED indicator provides a simple means of monitoring the optoisolator’s performance. The optoisolator is also designed to be resistant to electrical transient, surge and noise, making it an ideal choice for use in harsh environments. Additionally, the optoisolator is designed to be compliant with RoHS regulations.Conclusion: The HMHA281R3V optoisolator is an ideal choice for applications that require reliable, high voltage isolation between the input and output circuits, such as those commonly used in industrial control, communications, and medical equipment. Its single-surface mount design, built-in LED indicator, and resistance to electrical transients, surges, and noise make it an ideal choice for harsh environments. It is also RoHS compliant and able to provide reliable signal transmission and enhanced safety for sensitive electronics.

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