New Hall Effect Sensor A3144 (2 pack) View larger

Hall Effect Sensor A3144 (2 pack)


A sensor to meaure magnetism

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The A3144 is an integrated Hall effect latched sensor. Holding a magnet near the sensor will cause the output pin to toggle. This makes for a robust presence sensor. A reed sensor also works nicely, but can be limited by the glass encapsulation and size. A hall effect sensor is much smaller, but can handle less current than a reed switch.

The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifies the Hall voltage, and a Schmitt trigger to provide switching hysteresis for noise rejection, and open-collector output. An internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range.

If a magnetic flux density larger than the threshold, DO is turned on (low). The output state is held until a magnetic flux density reversal falls below Brp causing DO to be turned off (high).


  • Superior temperature resilience. Suitable for automotive or industrial applications
  • 4.5 V to 24 V Operation
  • Open-Collector 25mA output
  • Reverse battery protection
  • Activate with small, commercially available permanent magnets
  • Solid-State reliability
  • Small size
  • Resistant to physical stress


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