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Omnipolar magnetics • Small through-hole and surface mount (SOT-23 and SOT-89B) packages • Simple activation from either South pole or North pole • Low voltage 3 V capability • Built-in reverse polarity protection • Thermally balanced integrated circuit over full temperature range Available in three package styles: SS351AT in the subminiature SOT-23 surface mount; the SS551AT in the SOT-89B surface mount, and the SS451A in the leaded, flat TO-92-style. The SS351AT’s small size requires less PC board space, allowing it to be used in smaller assemblies. Its 3 Vdc capability allows for use in low voltage applications, promoting energy efficiency. Subminiature package size (SS351AT) supplied on tape and reel allows for a compact design with automated component placement, helping to reduce manufacturing costs. Operated by a North pole or a South pole, these products do not require the magnet polarity to be identified, thus making the installation easier and potentially reducing system cost. Built-in reverse polarity protection protects the device from potential damage during installation. Thermally balanced integrated circuit provides for stable operation over a wide temperature range. Potential applications include speed and RPM (revolutions per minute) sensing in fitness equipment, magnetic encoder for building access, damper or valve position control in HVAC (heating, ventilation and air conditioning) equipment, flow rate sensing in appliances and industrial processes, robotic control (cylinder position monitoring), displacement sensor in hospital beds, and medical equipment.

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