The SS351AT and SS451A 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 either a North pole or a South pole. These omnipolar sensors are sensitive and flexible devices designed to meet a wide range of potential applications. The SS351AT and SS451A have a typical operating point of 85 G at 25 °C [77 °F]. Because they can be operated by a North pole or a South pole, they do not require the magnet polarity to be identified, thus making the installation easier and potentially reducing the system cost. These sensors are available in two package styles. The SS351AT is available in the subminiature SOT-23 surface mount package; the SS451A is available in the leaded, flat TO- 92-style package. The SS351AT’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 SS351AT is available on tape and reel (3000 units per reel); the SS451A is available in a bulk package (1000 units per bag).
The SS351AT and SS451A sensors are small, versatile digital Hall‑effect devices that operate with either a north or south magnetic pole. SS351AT is supplied in a sub‑miniature SOT‑23 surface‑mount package, while SS451A is available in a leaded flat TO‑92 package, both supporting low‑voltage operation down to 3 Vdc.
Typical specifications include a supply voltage range of 3–24 Vdc, supply current of 3.5–5 mA, output current up to 20 mA, and operating temperature from –40 °C to 150 °C. The sensors are RoHS‑compliant and suitable for applications such as motion control, fluid level sensing, and medical equipment. Ordering information, mounting dimensions, and warranty details are provided in the document.
| Output current (max) | 20 mA |
|---|---|
| Operating temperature range | -40 °C to 150 °C |
| Typical operating magnetic field | 85 gauss at 25 °C |
| Package types | SS351AT: SOT‑23 surface‑mount; SS451A: TO‑92 leaded |
The sensors have a typical operating point of 85 gauss at 25 °C.
SS351AT is supplied in a SOT‑23 surface‑mount package, while SS451A is supplied in a flat TO‑92 leaded package.
The sensors can drive up to 20 mA of output current.