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Overview

SS340RT, SS440R Series Hall-effect digital sensor IC, unipolar, medium sensitivity, SOT-23, pocket tape and reel, 3000 units/reel.

The SS340RT/SS440R Series sensor ICs are small, versatile digital Hall-effect devices that are operated by the magnetic field from a permanent magnet or an electromagnet. They are designed to respond to a single pole: North (SS340RT) or South (SS440R).

These unipolar Hall ICs are supplied in three different magnetic sensitivities to meet a wide range of potential applications:

  • SS341RT and SS441R offer the highest sensitivity, with a typical operating point of 75 G (25°C) [77°F].
  • SS343RT and SS443R offer medium sensitivity, with a typical operating point of 135 G (25°C) [77°F].
  • SS349RT and SS449R offer the lowest sensitivity, with a typical operating point of 305 G (25°C) [77°F].

These sensors are available in two package styles:

  • The SS340RT is available in the miniature SOT-23 surface mount package.
  • SS440R is available in the leaded, flat TO-92-style package.

The SS340RT’s small size requires less PC board space, allowing it to be used in smaller assemblies. Its 3 Vdc capability allows for use in low voltage applications, promoting energy efficiency.

The SS340RT Series is available on tape and reel (3000 units per reel); the SS440R Series is available in a bulk package (1000 units per bag).

SS343RT Unipolar - Honeywell


Technical Specifications

Series Name SS340RT, SS440R
Product Type Hall-effect digital position sensor IC
Magnetic Actuation Type Unipolar
Supply Voltage 3 Vdc to 24 Vdc (-40°C to 125°C), 3 Vdc to 12 Vdc (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 Sinking
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 195 G max.; 135 G typ. (25°C)
Release Point 180 G max.; 85 G typ. (25°C)
Differential 5 G min.
Package Type SOT-23, pocket tape and reel, 3000 units/reel
Switching Time Rise (10 % to 90 %) 1.5 µs max.
Switching Time Fall (90 % to 10 %) 1.5 µs max.
Availability Global

Technical Specifications

Series Name SS340RT, SS440R
Product Type Hall-effect digital position sensor IC
Magnetic Actuation Type Unipolar
Supply Voltage 3 Vdc to 24 Vdc (-40°C to 125°C), 3 Vdc to 12 Vdc (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 Sinking
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 195 G max.; 135 G typ. (25°C)
Release Point 180 G max.; 85 G typ. (25°C)
Differential 5 G min.
Package Type SOT-23, pocket tape and reel, 3000 units/reel
Switching Time Rise (10 % to 90 %) 1.5 µs max.
Switching Time Fall (90 % to 10 %) 1.5 µs max.
Availability Global

Documents

TITLE DOCUMENT TYPE LANGUAGE SIZE
SS340RT/SS440R Unipolar Digital Hall-Effect Sensor ICs Datasheet Datasheet English 695KB
SS340RT/SS440R Unipolar Digital Hall-Effect Digital Position Sensor ICs Installation Instructions English 489KB
SOT-23 highres photo Photo -- 471KB
SOT-23 lowres photo Photo -- 59KB
Magnetic Sensor IC SOT-23 CAD Model CAD Model -- 84KB
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

Product Features

  • Subminiature package size (SS340RT) supplied on tape and reel: Allows for a compact design with automated component placement, helping to reduce manufacturing costs
  • Simple activation from a single pole and multiple magnetic sensitivities (high, medium and low): Make this product suitable in a variety of potential motion control, lid closure detection, and displacement sensing applications
  • Low voltage 3 V capability: Helps reduce power consumption
  • Built-in reverse polarity protection: Protects the device from potential damage during installation
  • Thermally balanced integrated circuit: Provides for stable operation over a wide temperature range of -40°C to 150°C [-40°F to 302°F]
  • RoHS-compliant materials: Meet Directive 2002/95/EC

Applications

Industrial:

  • Door or lid closure detection
  • Speed and RPM (revolutions per minute) sensing in fitness equipment
  • Flow rate sensing in industrial processes, appliances, and water softeners
  • Damper or valve position control in industrial, HVAC and residential or commercial applications
  • Robotic control (cylinder position monitoring)
  • Float-based fluid level sensing
  • Printer head position sensing

Medical:

  • Displacement sensor in hospital beds and medical equipment
  • Medication bin monitor on portable drug carts

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