{"product_id":"a3144-hall-effect-sensor-to-92-arduino-magnetic-switch","title":"A3144 Hall Effect Sensor TO-92 Arduino Magnetic Switch","description":"\u003cstyle\u003e\n  .nzn-desc {\n    width: 100%;\n    max-width: 1400px;\n    margin: 0 auto;\n    font-family: inherit;\n    color: #101114;\n  }\n\n  .nzn-desc,\n  .nzn-desc * {\n    box-sizing: border-box;\n  }\n\n  .nzn-desc .nzn-tabs {\n    width: 100%;\n    max-width: 100%;\n    display: flex;\n    gap: 30px;\n    border-bottom: 1px solid #e7e7e7;\n    overflow-x: auto;\n    overflow-y: hidden;\n    scrollbar-width: none;\n    min-height: 55px;\n    align-items: flex-end;\n    -webkit-overflow-scrolling: touch;\n  }\n\n  .nzn-desc .nzn-tabs::-webkit-scrollbar {\n    display: none;\n  }\n\n  .nzn-desc .nzn-tab {\n    flex: 0 0 auto;\n    background: none;\n    border: 0;\n    padding: 16px 0;\n    font: inherit;\n    font-size: 14px;\n    font-weight: 800;\n    white-space: nowrap;\n    border-bottom: 3px solid transparent;\n    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width: fit-content;\n      max-width: 100%;\n    }\n\n    .nzn-desc .nzn-checks li {\n      align-items: flex-start;\n      gap: 10px;\n      font-size: 14px;\n      text-align: left;\n    }\n\n    .nzn-desc .nzn-checks li::before {\n      margin-top: 2px;\n    }\n\n    .nzn-desc .nzn-uses {\n      grid-template-columns: 1fr;\n    }\n\n    .nzn-desc .nzn-specs div {\n      grid-template-columns: 1fr;\n      gap: 4px;\n      padding: 13px 10px;\n    }\n\n    .nzn-desc .nzn-section-title {\n      text-align: left;\n      padding-top: 0;\n      margin-bottom: 22px;\n    }\n\n    .nzn-desc .nzn-started {\n      padding: 20px 16px;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"nzn-desc\"\u003e\n\u003cdiv class=\"nzn-tabs\"\u003e\n\u003cbutton class=\"nzn-tab is-active\" type=\"button\" data-tab=\"overview\"\u003eOverview\u003c\/button\u003e \u003cbutton class=\"nzn-tab\" type=\"button\" data-tab=\"specifications\"\u003eSpecifications\u003c\/button\u003e \u003cbutton class=\"nzn-tab\" type=\"button\" data-tab=\"getting-started\"\u003eGetting Started\u003c\/button\u003e \u003cbutton class=\"nzn-tab\" type=\"button\" data-tab=\"uses\"\u003eCommon Uses\u003c\/button\u003e \u003cbutton class=\"nzn-tab\" type=\"button\" data-tab=\"faqs\"\u003eFAQs\u003c\/button\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-card\"\u003e\n\u003cdiv class=\"nzn-panel is-active\" data-panel=\"overview\"\u003e\n\u003cdiv class=\"nzn-panel-content\"\u003e\n\u003cdiv class=\"nzn-overview\"\u003e\n\u003cdiv class=\"nzn-overview-copy\"\u003e\n\u003cp\u003eThe A3144 Hall Effect Sensor is a reliable digital magnetic switch sensor in a compact TO-92 package designed for Arduino, ESP32, RPM measurement, wheel speed detection, magnetic proximity sensing, robotics, and automation projects.\u003c\/p\u003e\n\u003cul class=\"nzn-checks\"\u003e\n\u003cli\u003eDigital Hall Effect magnetic switch output\u003c\/li\u003e\n\u003cli\u003eCompact TO-92 package\u003c\/li\u003e\n\u003cli\u003eWide 4.5V – 24V operating voltage\u003c\/li\u003e\n\u003cli\u003eOpen collector digital output\u003c\/li\u003e\n\u003cli\u003eActive LOW output when magnet is detected\u003c\/li\u003e\n\u003cli\u003eFast switching response\u003c\/li\u003e\n\u003cli\u003eCompatible with Arduino, ESP32 \u0026amp; Raspberry Pi\u003c\/li\u003e\n\u003cli\u003eBreadboard-friendly design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-started\"\u003e\n\u003ch3\u003eQuick Wiring\u003c\/h3\u003e\n\u003cdiv class=\"nzn-step\"\u003e\n\u003cspan\u003e1\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eFace the flat side toward you\u003c\/strong\u003e\n\u003cp\u003eThe “3144 609” marked side should face toward you when identifying pins.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-step\"\u003e\n\u003cspan\u003e2\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eConnect VCC\u003c\/strong\u003e\n\u003cp\u003ePin 1 → 4.5V–24V supply voltage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-step\"\u003e\n\u003cspan\u003e3\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eConnect GND\u003c\/strong\u003e\n\u003cp\u003ePin 2 → Ground.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-step\"\u003e\n\u003cspan\u003e4\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eRead digital output\u003c\/strong\u003e\n\u003cp\u003ePin 3 → Digital input pin on your microcontroller.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-note\"\u003e\n\u003cstrong\u003ePlease note:\u003c\/strong\u003e The A3144 is a digital Hall switch sensor — output changes state when a magnetic field is detected.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-panel\" data-panel=\"specifications\"\u003e\n\u003cdiv class=\"nzn-panel-content\"\u003e\n\u003ch3 class=\"nzn-section-title\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"nzn-specs\"\u003e\n\u003cdiv\u003e\n\u003cspan\u003eModel\u003c\/span\u003e\u003cstrong\u003eA3144 \/ 3144 609 marking\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eSensor Type\u003c\/span\u003e\u003cstrong\u003eDigital Hall Effect Switch\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003ePackage\u003c\/span\u003e\u003cstrong\u003eTO-92\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eOperating Voltage\u003c\/span\u003e\u003cstrong\u003e4.5V – 24V DC\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eOutput Type\u003c\/span\u003e\u003cstrong\u003eDigital Open Collector\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eOutput State\u003c\/span\u003e\u003cstrong\u003eLOW when magnet detected\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003ePull-up Resistor\u003c\/span\u003e\u003cstrong\u003eRequired on output if not using internal pull-up\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eSwitching Type\u003c\/span\u003e\u003cstrong\u003eUnipolar digital Hall switch\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eResponse Time\u003c\/span\u003e\u003cstrong\u003eFast switching response\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eOperating Temperature\u003c\/span\u003e\u003cstrong\u003e-40°C to +85°C\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eBody Width\u003c\/span\u003e\u003cstrong\u003eApprox. 4.1mm\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eBody Height\u003c\/span\u003e\u003cstrong\u003eApprox. 4.0mm\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eLead Pitch\u003c\/span\u003e\u003cstrong\u003e1.27mm\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eLead Length\u003c\/span\u003e\u003cstrong\u003eApprox. 13.5mm+\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-note\"\u003e\n\u003cstrong\u003ePlease note:\u003c\/strong\u003e Open collector outputs commonly need a pull-up resistor so the output can read HIGH when the sensor is inactive.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-panel\" data-panel=\"getting-started\"\u003e\n\u003cdiv class=\"nzn-panel-content\"\u003e\n\u003cdiv class=\"nzn-started\"\u003e\n\u003ch3\u003eGetting Started\u003c\/h3\u003e\n\u003cdiv class=\"nzn-step\"\u003e\n\u003cspan\u003e1\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eInsert into breadboard\u003c\/strong\u003e\n\u003cp\u003eThe TO-92 package is suitable for standard breadboard prototyping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-step\"\u003e\n\u003cspan\u003e2\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eConnect power\u003c\/strong\u003e\n\u003cp\u003eConnect VCC and GND to your Arduino, ESP32, or other microcontroller circuit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-step\"\u003e\n\u003cspan\u003e3\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eConnect output pin\u003c\/strong\u003e\n\u003cp\u003eConnect OUT to a digital GPIO input. Use a pull-up resistor or internal pull-up if required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-step\"\u003e\n\u003cspan\u003e4\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBring magnet close\u003c\/strong\u003e\n\u003cp\u003eThe output switches LOW when the correct magnetic field is detected.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-note\"\u003e\n\u003cstrong\u003ePlease note:\u003c\/strong\u003e Magnetic field strength, polarity, distance, and sensor orientation affect switching performance.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-panel\" data-panel=\"uses\"\u003e\n\u003cdiv class=\"nzn-panel-content\"\u003e\n\u003ch3 class=\"nzn-section-title\"\u003eCommon Uses\u003c\/h3\u003e\n\u003cdiv class=\"nzn-uses\"\u003e\n\u003cdiv class=\"nzn-use\"\u003eMotor RPM and wheel speed sensing\u003c\/div\u003e\n\u003cdiv class=\"nzn-use\"\u003eMagnetic proximity detection\u003c\/div\u003e\n\u003cdiv class=\"nzn-use\"\u003eDoor open\/close detection\u003c\/div\u003e\n\u003cdiv class=\"nzn-use\"\u003eArduino and ESP32 digital sensor projects\u003c\/div\u003e\n\u003cdiv class=\"nzn-use\"\u003eRobotics and automation systems\u003c\/div\u003e\n\u003cdiv class=\"nzn-use\"\u003eContactless magnetic switching\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-note\"\u003e\n\u003cstrong\u003ePlease note:\u003c\/strong\u003e Digital Hall sensors are ideal for ON\/OFF detection rather than measuring magnetic field strength.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-panel\" data-panel=\"faqs\"\u003e\n\u003cdiv class=\"nzn-panel-content\"\u003e\n\u003ch3 class=\"nzn-section-title\"\u003eCommon Questions\u003c\/h3\u003e\n\u003cdiv class=\"nzn-faq\"\u003e\n\u003cdiv class=\"nzn-faq-item\"\u003e\n\u003cstrong\u003eIs this a digital or analog Hall sensor?\u003c\/strong\u003e\n\u003cp\u003eThis is a digital Hall switch sensor with ON\/OFF output behaviour. It does not output a proportional analog voltage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-faq-item\"\u003e\n\u003cstrong\u003eWill this work with Arduino?\u003c\/strong\u003e\n\u003cp\u003eYes. Connect OUT to a digital input pin and read HIGH\/LOW changes using digitalRead().\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-faq-item\"\u003e\n\u003cstrong\u003eDo I need a pull-up resistor?\u003c\/strong\u003e\n\u003cp\u003eThe A3144 uses an open collector style output, so a pull-up resistor is normally required unless your microcontroller input has an internal pull-up enabled.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-faq-item\"\u003e\n\u003cstrong\u003eWhat happens when a magnet is near?\u003c\/strong\u003e\n\u003cp\u003eThe output switches LOW when the correct magnetic field is detected near the sensor face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-faq-item\"\u003e\n\u003cstrong\u003eIs this the same as the AH3503?\u003c\/strong\u003e\n\u003cp\u003eNo. The AH3503 is a linear analog Hall sensor. The A3144 is a digital magnetic switch sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nzn-note\"\u003e\n\u003cstrong\u003ePlease note:\u003c\/strong\u003e For analog magnetic field measurement, use a linear Hall sensor instead.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"NZN Electronics","offers":[{"title":"10 Pack","offer_id":42758034849888,"sku":"A3144-HALL-TO92","price":2.99,"currency_code":"NZD","in_stock":true},{"title":"25 Pack","offer_id":42758034882656,"sku":"A3144-HALL-TO93","price":4.99,"currency_code":"NZD","in_stock":true},{"title":"50 Pack","offer_id":42758034915424,"sku":"A3144-HALL-TO94","price":6.99,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/6127\/0112\/files\/A3144-Closeup.png?v=1778883828","url":"https:\/\/www.nznelectronics.co.nz\/products\/a3144-hall-effect-sensor-to-92-arduino-magnetic-switch","provider":"NZN Electronics","version":"1.0","type":"link"}