SS340RT and SS440R Unipolar Hall-Effect Sensor
General Description:
The SS340RT Series and SS440R Series sensors 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 Series) or South (SS440R Series).
These unipolar sensors are supplied in three different magnetic sensitivities to meet a wide range of potential applications. The SS341RT and SS441R offer the highest sensitivity, with a typical operating point of 85 G at 25 °C [77 °F]; the SS343RT and SS443R offer medium sensitivity with 125 G typical at 25 °C [77 °F]; the SS349RT and SS449R offer the lowest sensitivity, requiring 350 G typical to operate at 25 °C [77 °F].
These sensors are available in two package styles. The SS340RT Series is available in the miniature SOT-23 surface mount package; the SS440R is available in the leaded, flat TO-92-style package. The SS340RT’s small size requires less PCboard space, allowing it to be used in smaller assemblies. Its 3 V 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).
Features:
- Subminiature package size (SS340RT Series) 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, from -40 °C to 150 °C [-40 °F to 302 °F]
- RoHS-compliant materials meet Directive 2002/95/EC
Applications:
- Door or lid closure detection
- Speed and RPM (revolutions per minute) sensing in fitness equipment
- Flow rate sensing in industrial processes, appliances, or water softeners
- Damper or valve position control in industrial, HVAC or residential or commercial applications
- Robotic control (cylinder position monitoring)
- Float-based fluid level sensing
- Displacement sensor in hospital beds or medical equipment
- Medication bin monitor on portable drug carts
- Printer head position sensing
Related Product Information:
| Part No | Description |
| SS341RT | Bipolar Hall-effect Digital Position Sensors |
| SS343RT | Bipolar Hall-effect Digital Position Sensors |
| SS349RT | Bipolar Hall-effect Digital Position Sensors |
| SS441R | Bipolar Hall-effect Digital Position Sensors |
| SS443R | Bipolar Hall-effect Digital Position Sensors |
| SS449R | Bipolar Hall-effect Digital Position Sensors |