A1202EUA-T

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A1202EUA-T is a magnetic sensor produced by Allegro Microsystem, with bipolar latching hall-effect, operated by a permanent magnet. It can sense both the north and south poles of the magnet regardless of the magnet polarization direction and can be used in a variety of applications, primarily for detecting the presence of a magnet or limit switch operation. Therefore, it can be categorized as a magnetic switch under solid-state sensors.

The device consists of a Hall-element IC with an integrated 12Vth voltage regulator, built-in protection circuit and open-collector output. The package type is TO-92-3, with a size of 2.403mm x 0.635mm x 1.3mm. It can provide reliable performance in the temperature range of -40 to +125°C and a temperature rise of is maintained by a thermal shutoff circuit that limits the power dissipation to 250mW. It provides an immunity to shock up to 1500G, making it a reliable solution for extreme conditions. The device is constructed from an epoxy plastic UL 94 V-0 package, and a built-in Hall voltage generator and a Schottky diode detector.

The device itself work by detecting a magnetic field. When the north pole of permanent magnet approaches the A1202EUA-T device, the built-in Hall-effect transistor generates an output voltage. This voltage is then processed by the built-in Schottky diode detector and the open-collector output produces a high level. Similarly, when the southpole of permanent magnet approaches the same device, again the built-in Hall-effect transistor generates an output voltage. This voltage is again processed by the built-in Schottky diode detector and the open-collector output produces again a high level.

This output can be used to control an electromechanical device. For example, this device can be used to detect and locate material undergoing inspection processes in manufacturing. It is capable of identifying and locating objects amid a wide variety of materials as well as detecting the passage of a moving object. Additionally, it can be used for limit switch operation, for instance when opening and closing a door or clamping an object into a specific location.

The device can be used in many industries including automotive, railway, and marine, for instance, it can be used to open/close a train doors in railway applications, as well as providing a backup signal for anti-lock braking system (ABS) in automotive applications. It can also be used in robotics for movement detection, thanks to its robust mechanical structure.

The A1202EUA-T, magnetic sensor produced by Allegro Microsystems, is a reliable device for detecting the presence of a magnet or limit switch operation. It operates by detecting the presence of a magnetic field, and generates a high signal in response. Its solid-state construction makes it a reliable solution for extreme conditions, and its wide range of applications make it ideal for use in many industries, particularly automotive, railway and marine.

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