The SS340RT and SS440R series unipolar Hall-effect digital position sensors are small, versatile digital Hall-effect devices 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 PC board 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/BENEFITS Subminiature package size (SS340RT Series) supplied on tape and reel allows for a compact design with automated component placement, helping to reduce manufacturing costs.
The SS340RT and SS440R Series are small, versatile digital Hall‑effect devices that activate from a single magnetic pole (North for SS340RT, South for SS440R). They are offered in three magnetic sensitivities—high (85 G), medium (125 G) and low (350 G)—and in two package styles: miniature SOT‑23 surface‑mount for the SS340RT and flat TO‑92 leaded for the SS440R.
These sensors are suited for a wide range of applications such as door or lid closure detection, speed and RPM sensing, flow‑rate monitoring, valve position control, robotic cylinder monitoring, and medical equipment positioning. They are supplied on tape‑and‑reel (SS340RT) or bulk (SS440R) packaging and meet RoHS Directive 2002/95/EC.
Yes, they can operate at 3 V, making them suitable for low‑voltage designs.
Yes, the sensors meet the RoHS Directive 2002/95/EC.