HMHAA280R3V

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The HMHAA280R3V optoisolator from Vishay Intertechnology is a transistor output, photovoltaic optoisolator. Optoisolators, also known as optocouplers, are used to electrically isolate circuits or components in order to reduce electromagnetic interference (EMI) while allowing a signal to be transmitted between the two. This particular optoisolator consists of an LED emitter and an integrated photovoltaic detector, which serve as a combination of an electrical signal transmitter and receiver.

The LED emitter operates at 20mA forward current with a typical rise/fall time of 2.5/1.0 µs, and the integrated photovoltic detector has a peak sensitivity of around 1.2 mA/W and a maximum reverse voltage of 5V. The HMHAA280R3V is rated at 105 VAC, with an operating temperature range of -40°C to +85°C, making it suitable for a wide range of applications where speed, noise immunity and signal isolation are required. It is also UL6095B-compliant.

The HMHAA280R3V optoisolator is commonly used in power systems and automation applications, as well as in industrial electronics. It can be used in AC voltage power conversion, lightning surge protection, EMC (electromagnetic compatibility) testing, electrical protection circuits, insulation detection systems, and low-voltage motor starters. It is also used in medical devices, such as light therapy, ECG machines, and patient monitoring systems. Additionally, it can be used in agricultural applications, such as plant monitors, water monitors, and solenoid valves.

The working principle of the HMHAA280R3V is based on the principles of photovoltaic effect and photoconductivity. When the LED emitter is activated by an external signal, it emits photons of light, which strike the photovoltaic detector. The detector absorbs the photons of light, creating an imbalance of charge and resulting in a voltage potential across the boundaries of the material. This voltage potential is then used to turn on a transistor within the optoisolator, which allows an electrical current to flow across the isolation barrier.

The HMHAA280R3V optoisolator is a reliable and cost-effective solution for electrical isolation and signal transmission in a wide range of applications. It is simple and easy to install, and provides excellent noise immunity, signal integrity, and compatibility with a variety of circuits. Its reliable performance and low power consumption make it a suitable choice for industrial and commercial applications.

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