Miniature omnipolar TMR sensors draw low current in flange-mounted applications

The 54100 and 54140 omnipolar tunnel magnetoresistance (TMR) sensors from Littelfuse feature digital switching at up to 1 kHz, handling a maximum load of 3 mA at 5.5 V dc. The IP67-rated housing is available in two mounting options.

The Littelfuse 54100 and 54140 sensors give designers a low-power, low-profile solution for reliable magnetic position sensing in demanding applications. Rated for 20 billion switching operations, the 54100 and 54140 offer long lifetime and reliable performance. 

These sensors also feature an IP67-rated housing that is specified to withstand vibration of a maximum 50 g and shock of up to 150 g.

The 54100 can be mounted using two screws on either side of the sensor. The thickness of the mounting structures is 1.5 mm, and the footprint is 11.0 mm x 25.5 mm.

The 54140 places both mounting holes on one side of the sensor, which is encapsulated in a housing which measures 23.0 mm x 7.5 mm x 5.9 mm. The mounting structure thickness is 2.9 mm.

Both sensors feature a three-wire design with push-pull output. They can operate in static or dynamic magnetic field environments with north or south polarity. The supply voltage is 1.8 V to 5.5 V  dc with protection for up to 7 V dc.

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