Sold out · Ask us about restocking
Not available to order right now.
The A3144 module functions as a switch that turns on or off in the presence of a magnetic field, described in the listing as reading HIGH, around 3.5V, on its signal line when no magnet is nearby, and switching to LOW when a magnetic field is detected, at which point an onboard LED indicator also lights up as a visual confirmation. It's a digital output Hall-effect sensor, meaning the output is a clean switched signal rather than a variable analog reading.
One useful characteristic is that it can detect the presence of either pole of a magnet, north or south, rather than being sensitive to only one orientation, which makes wiring and mounting a magnet for detection somewhat more forgiving than a polarity-sensitive sensor would be.
Operating voltage is typically 5V DC, with output current of 25mA, power consumption at rest of 3mA, and power consumption when switched of 8mA, all modest figures for a microcontroller-driven project. Turn-on and turn-off time is rated at 2 seconds each, and the module includes inbuilt reverse polarity protection, guarding against a common wiring mistake when connecting power.
Operating temperature ranges from -40C to 90C according to the module's features section (with a closely related figure of -40C to 85C given elsewhere in the specification), a genuinely wide range that the listing itself notes makes the sensor suitable for automotive and industrial applications as well as everyday hobby projects. The module measures 20mm by 16mm and weighs about 2g.
Anyone building a door or lid open/close detector, a simple RPM counter using a spinning magnet, or any project needing a reliable digital trigger from a nearby magnet will find the A3144 module's clean switching behaviour and reverse polarity protection a dependable, low-cost choice.
The output goes LOW and an onboard LED lights up.
Yes, it can detect either pole of a magnet.
Typically 5V DC.
Yes, it has inbuilt reverse polarity protection.
The listing gives -40C to 90C in its features section, and -40C to 85C in its specification table.
| Brand | Generic |
|---|---|
| Operating Voltage | 5V |
| Selling unit | PCS |
