55100-AP - 55100 Series

Series: 55100
Questions? Contact Littelfuse Support
Roll Over to Zoom
Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

A miniature flange mount Hall effect sensor 25.5mm (1.004") x 11.00mm (0.433") and only 3.00mm (0.118") high with a choice of digital or programmable analog outputs. Available in 3-wire (voltage output) or 2-wire (current output) versions. Its case design enables screw or adhesive mounting. Capable of switching up to 28Vdc and 20mA. Available with a range of sensitivity, cable length and connector options. Ideally suited for position and limit sensing, rotation and flow measurement, commutation of brushless DC motors, angular sensing and magnetic encoding.


  • Magnetically operated position sensor
  • Digital or programmable analog types available
  • Open collector output
  • Medium, high or programmable sensitivities
  • Integral reverse/over-voltage protection
  • Built-in temperature compensation


  • High switching speed up to 10kHz
  • Long life, up to 20 billion operations
  • Unaffected by harsh environments
  • Operates in static or dynamic magnetic field
  • Available with a selection of cable length and connector options


  • Position and limit sensing
  • RPM measurement
  • Flow metering
  • Commutation of brushless DC motors
  • Angle sensing
  • Magnetic encoders
Property (Mouseover for details) Value
Operating Supply Voltage (V DC) 4.5 to 5.5
Output High 4.65 V
Output Low 0.35 V
Magnetic Sensitivity (Gauss) Programmable
Nominal Activate Distance (mm) Contact Littelfuse
Output Type Analog Voltage
Operating Temperature -40° to 100°C

pdf icon Automated Doors and Gates

pdf icon Electric Two-/Three-Wheeler Solutions

pdf icon EV Charging

pdf icon System Solutions for Major Appliances

pdf icon Building and Home Automation Application Guide

Today's buildings and homes are equipped with intelligent technologies for safer, more convenient, and energy-efficient living.

pdf icon Sensing Products Selection Guide

This guide provides an introduction to magnetic sensing and options for value-added custom design packages.

pdficon Flow Sensing in Tankless Water Heaters Application Note

Reed switches and sensors are highly effective solutions for flow sensing applications that can be used for detecting the presence of fluid flow in a system or even measure the rate of fluid flow.

pdficon Position and Level Sensing in Washing Machines

A most integral appliance in any home is a washing machine. Washing machines have helped made the chore of cleaning clothes quite effortless.

pdficon Rice Cooker Lid Lock Application Note

The position sensing lid lock ensures that the lid is securely locked in place.

pdficon Hall Effect Sensor Technical Information Application Note

Hall Sensor Technical Information

pdficon Catalog Glossary Reed Switch Terms Application Note

Reed Switch Terms Glossary

pdficon Littelfuse Hall Effect Sensors 55100 datasheet

To request product environmental information, please complete the Product Environmental Information Request Form.