A3281ELHLT-T

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Magnetic Sensors - Switches (Solid State)

A3281ELHLT-T is a solid state magnetic sensor switch from Allegro Microsystems Inc. which can detect when an external magnet is present or absent. This is a Hall effect, unipolar switch with a through-hole type package and is rated at 300mW power dissipation. This can be used to detect the presence of metal objects in a broad range of applications.

A3281ELHLT-T Application Field

The A3281ELHLT-T magnetic sensor switch is primarily used to detect the presence and absence of metal objects in a number of applications. This can be used in security systems, safety monitoring systems, and access control systems. This is also used in proximity switches and keyless entry systems.

This device is suitable for industrial and consumer grade applications. The A3281ELHLT-T can be used in non-intrusive applications such as utility meters, beverage vending machines, liquid level sensors, lift gates, hot tubs, door locks, personal computers, electric cars, consumer electronics, and access control systems.

A3281ELHLT-T Working Principle

The A3281ELHLT-T magnetic sensor switch consists of a sensing component and an amplifier, which together detect the presence and absence of magnetism. The sensing component utilizes Hall effect, which is a phenomenon where an electric potential is generated perpendicular to an electric current and a magnetic field. When the sensing component detects an external magnetic field, the amplifier amplifies the signal and sends it to the output pin.

The output pin can output either a high or a low voltage depending on the presence or absence of the external magnetic field. It also has an operating temperature of -40°C to 125°C and a supply voltage of between 2.7V to 5.5V, making it suitable for a wide variety of applications. The A3281ELHLT-T is designed to have a very low power consumption of 300mW.

Conclusion

In conclusion, the A3281ELHLT-T magnetic sensor switch from Allegro Microsystems Inc. is a highly reliable and efficient device used to detect the presence and absence of metal components in various applications. This switch utilizes the Hall effect to detect a magnetic field and can operate within an operating temperature of -40°C to 125°C and a supply voltage of between 2.7V to 5.5V. This device also has a very low power consumption of 300mW which makes it suitable for energy conscious applications.

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