SS551AT Omnipolar, Hall-effect digital position sensor IC, low sensitivity, SOT-89B, 1000 units/pocket tape and reel

The SS551AT Series Low-Cost Bipolar Hall-Effect sensors in a surface-mount package have a thermally balanced integrated circuit over full temperature range. The bipolar magnetics respond to alternating North and South poles.

A built-in regulator provides very stable operation over 4.5 Vdc to 24 Vdc supply voltage range, and internal circuitry prevents sensor damage in case the supply voltage polarity is accidentally reversed. The SS50AT Series Low-Cost Bipolar Hall-Effect sensors are small, versatile digital Hall-effect devices that are operated by the magnetic field from a permanent magnet or an electromagnet. The open-collector sinking output voltage is easily interfaced with a wide variety of electronic circuits.

NOTE: The integrated circuitry provides excellent temperature stability and accuracy in a robust design. These digital Hall sensors have an operating temperature range of -40 °C to 125 °C [-40 °F to 257 °F], appropriate for commercial, consumer, and industrial environments.

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Produkt Merkmale


  • Miniature construction: SOT-89B plastic package, on tape and reel for automated assembly
  • Power comsumption of only 5 mA max at 4.5 Vdc for energy efficiency
  • Digital current sinking output
  • Bipolar magnetics for ring magnet applications
  • High output current capability (20 mA)
  • High speed—Operates from 0 kHz to over 100 kHz
  • Broad temperature range of -40 °C to 125 °C [-40 °F to 257 °F]
  • Built-in reverse polarity protection


  • Speed and RPM sensor
  • Brushless DC motor commutation
  • Motor and fan control
  • Magnetic encoding
  • Tachometer, counter pickup
  • Disc speed, tape rotation sensing
  • Flow-rate sensing

Technische Daten

Series Name
SS351AT, SS451A, SS551AT
Product Type
Hall-effect digital position sensor IC
Magnetic Actuation Type
Supply Voltage
3 Vdc to 24 Vdc (-40°C to 150°C)
Output Voltage
0.4 Vdc max.
Supply Current
3.5 mA typ. (25°C, 3 Vdc)
Output Current
20 mA
Leakage Current
10 µA max.
Output Type
Operating Temperature
-40°C to 150°C [-40°F to 302°F]
Storage Temperature
-40°C to 150°C [-40°F to 302°F]
Operate Point
85 G typ. (-40°C to 150°C)
Release Point
-40 G typ. (-40°C to 150°C)
35 G typ. (-40°C to 150°C)
Package Type
SOT-89B, pocket tape and reel, 1000 units/reel
Switching Time Rise (10 % to 90 %)
1.5 µs max.
Switching Time Fall (90 % to 10 %)
1.5 µs max.

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