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The SS345PT/SS445P sensors are small, versatile digital Hall-effect devices that are operated by the magnetic field from a permanent magnet or an electromagnet, designed to respond to a single North pole (SS345PT) or South pole (SS445P).

These unipolar sensors are designed to meet the requirements of a wide range of potential applications. The internal pull-up resistor often eliminates the need for external components, further helping to reduce the system cost. These economical unipolar sensors are well suited for simple, high-volume, cost-sensitive position and motion sensing applications.

The 2.7 Vdc to 7 Vdc supply voltage range allows this device to be used in low voltage applications. The SS345PT’s very small size requires less PCB (printed circuit board) space, allowing it to be used in smaller assemblies.

These sensors are available in two package styles: the SS345PT in the subminiature SOT-23 surface mount package; the SS445P is available in the leaded, flat TO-92-style package.

The SS345PT is available on tape and reel (3000 units per reel); the SS445P is available in a bulk package (1000 units per bag).

SS345PT, SS445P Hall-effect sensor ICs - Honeywell


SS345PT/SS445P Unipolar Hall-Effect Digital Position Sensor ICs With Built-in Pull-up Resistor Datasheet English 448KB
SS345PT/SS445P Unipolar Hall-Effect Digital Position Sensors with Built-in Pull-Up Resistor Installation Instructions English 269KB
Position Sensors Range Guide Product Range Guide English 2MB
Magnetic Sensors Line Guide Product Line Guide English 377KB
Magnetic Sensor IC Product Line Card Line Card/Selection Chart English 433KB
Magnetic Sensor IC Selection Chart Line Card/Selection Chart English 176KB
Sensors and Switches: Solutions for Medical Applications Flyer English 2MB

Browse SS345PT, SS445P Products

Product Package Type Operate Point
SS345PT SOT-23, pocket tape and reel, 3000 units/reel 180 G typ. (-40°C to 150°C)
SS445P Flat TO-92-style, straight standard leads, bulk pack, 1000 units/bag 180 G typ. (-40°C to 150°C)


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