{"product_id":"acs712-hall-effect-current-sensor-module-5a-20a-30a","title":"ACS712 Hall Effect Current Sensor Module 5A 20A 30A | ALLOYSEED","description":"\n\u003ch2\u003eACS712 Hall Effect Current Sensor Module – Precise 5A \/ 20A \/ 30A Detection\u003c\/h2\u003e\n\u003cp\u003eTake full control of your electronics projects with the \u003cstrong\u003eACS712 Current Sensor Module\u003c\/strong\u003e by ALLOYSEED. Built around the trusted \u003cstrong\u003eACS712ELC-05B chip\u003c\/strong\u003e, this compact Hall Effect sensor board delivers accurate, real-time measurement of both positive and negative AC\/DC currents across three selectable ranges: \u003cstrong\u003e5A, 20A, and 30A\u003c\/strong\u003e. Whether you're building an Arduino power monitor, a solar charge controller, or an industrial automation circuit, this module is your go-to solution for reliable current sensing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccurate Current Sensing:\u003c\/strong\u003e Powered by the ACS712ELC-05B chip, this module measures both positive and negative currents from 5A up to 30A with analog output sensitivity ranging from 100 mV\/A to 185 mV\/A for precise readings every time.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy 5V Power Supply:\u003c\/strong\u003e A convenient pin header interface connects directly to a standard 5V power source. An onboard power indicator LED gives you instant visual confirmation that the module is active and ready.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-Compact PCB Design:\u003c\/strong\u003e At just 31 mm × 13 mm (1.22 × 0.51 in) and weighing only 3 g, this board fits into tight enclosures and breadboard setups with ease. The green screw terminal ensures a secure, tool-friendly wire connection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStable Default Voltage Output:\u003c\/strong\u003e When no current flows, the module outputs a default VCC\/2 voltage, providing a stable baseline that makes signal processing and threshold detection straightforward for any microcontroller.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad Microcontroller Compatibility:\u003c\/strong\u003e Works seamlessly with Arduino, Raspberry Pi, ESP32, STM32, and other 5V\/3.3V MCU platforms. Ideal for DIY electronics, robotics, energy monitoring, and embedded system prototyping.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHall Effect Technology:\u003c\/strong\u003e Non-contact current measurement means no need to break the circuit — simply route the current-carrying wire through the module's terminal for safe, isolated sensing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eSensor Chip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eACS712ELC-05B (Hall Effect)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eMeasuring Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e5A \/ 20A \/ 30A (model dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eAnalog Output Sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e100 mV\/A – 185 mV\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eSupply Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDefault Output (no current)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eVCC\/2\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003ePCB Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e31 × 13 mm \/ 1.22 × 0.51 in\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e3 g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e1 × ACS712 Current Sensor Module\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino \u0026amp; Raspberry Pi power monitoring projects\u003c\/li\u003e\n  \u003cli\u003eSolar panel and battery charge controllers\u003c\/li\u003e\n  \u003cli\u003eMotor current protection circuits\u003c\/li\u003e\n  \u003cli\u003eHome energy monitoring systems\u003c\/li\u003e\n  \u003cli\u003eIndustrial automation and robotics\u003c\/li\u003e\n  \u003cli\u003eDIY electronics and educational STEM projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Usage Note\u003c\/h3\u003e\n\u003cp\u003eThe ACS712 sensor operates on Hall Effect principles and can be affected by strong external magnetic fields. For best accuracy, keep the module away from powerful magnets or electromagnets during operation. Allow 1–2 cm measuring tolerance due to manual measurement of the PCB dimensions. Slight color variation from product images may occur due to monitor calibration differences.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/22awg-glass-tube-fuse-holder-5x20mm-6x30mm-screw-type-10-pack\"\u003e10-Pack 22AWG Glass Tube Fuse Holder 5x20mm \u0026amp; 6x30mm Screw\u003c\/a\u003e – Keep your circuits protected with reliable fuse holders.\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/140w-usb-c-fast-charging-adapter-auto-power-off-overcharge-protection\"\u003e140W USB-C Fast Charger with Auto Power-Off Overcharge Protection\u003c\/a\u003e – Pair smart charging hardware with smart current monitoring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFurther Reading\u003c\/h3\u003e\n\u003cp\u003eFor guidance on electrical safety standards and best practices when working with electronic modules and current sensors, visit the \u003ca href=\"https:\/\/www.nist.gov\/engineering-laboratory\/smart-grid\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNIST Engineering Laboratory – Smart Grid Research\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the difference between the ACS712 5A, 20A, and 30A modules?\u003c\/h4\u003e\n\u003cp\u003eA: Each variant of the ACS712 current sensor module is factory-calibrated for a different maximum current range. The 5A version offers the highest sensitivity at 185 mV\/A, making it ideal for low-power circuits. The 20A version outputs 100 mV\/A and suits medium-load applications, while the 30A version (also 66 mV\/A) is best for high-current systems like motor control or solar power management. Choose the range that matches your expected peak current for the most accurate readings.\u003c\/p\u003e\n\u003ch4\u003eQ: Is the ACS712 current sensor module compatible with Arduino and Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The ACS712 Hall Effect current sensor module is fully compatible with Arduino (Uno, Nano, Mega), Raspberry Pi, ESP32, STM32, and virtually any microcontroller that has an analog input and operates at 5V. Simply connect VCC to 5V, GND to ground, and read the analog output pin with your ADC. Many open-source libraries and sketches are available to simplify integration.\u003c\/p\u003e\n\u003ch4\u003eQ: Can this module measure both AC and DC current?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The ACS712 sensor chip is capable of measuring both AC (alternating current) and DC (direct current). For AC measurements, you'll need to apply RMS calculation in your code, typically by sampling the output over a full cycle and computing the root mean square value. For DC, a simple analog read and offset correction (from the VCC\/2 baseline) is sufficient.\u003c\/p\u003e\n\u003ch4\u003eQ: What precautions should I take when using the ACS712 Hall Effect sensor?\u003c\/h4\u003e\n\u003cp\u003eA: To ensure accurate current measurements, keep the ACS712 module away from strong magnetic fields such as large transformers, motors, or permanent magnets, as these can interfere with Hall Effect sensing. Also ensure your power supply is a clean, stable 5V — voltage fluctuations can affect the output accuracy. Always route only the current-carrying wire (not the entire circuit) through the module's screw terminal for proper operation.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the difference between the ACS712 5A, 20A, and 30A modules?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Each variant of the ACS712 current sensor module is factory-calibrated for a different maximum current range. The 5A version offers the highest sensitivity at 185 mV\/A, making it ideal for low-power circuits. The 20A version outputs 100 mV\/A and suits medium-load applications, while the 30A version (also 66 mV\/A) is best for high-current systems like motor control or solar power management. Choose the range that matches your expected peak current for the most accurate readings.\"}}, {\"@type\": \"Question\", \"name\": \"Is the ACS712 current sensor module compatible with Arduino and Raspberry Pi?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! The ACS712 Hall Effect current sensor module is fully compatible with Arduino (Uno, Nano, Mega), Raspberry Pi, ESP32, STM32, and virtually any microcontroller that has an analog input and operates at 5V. Simply connect VCC to 5V, GND to ground, and read the analog output pin with your ADC. Many open-source libraries and sketches are available to simplify integration.\"}}, {\"@type\": \"Question\", \"name\": \"Can this module measure both AC and DC current?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The ACS712 sensor chip is capable of measuring both AC (alternating current) and DC (direct current). For AC measurements, you'll need to apply RMS calculation in your code, typically by sampling the output over a full cycle and computing the root mean square value. For DC, a simple analog read and offset correction (from the VCC\/2 baseline) is sufficient.\"}}, {\"@type\": \"Question\", \"name\": \"What precautions should I take when using the ACS712 Hall Effect sensor?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"To ensure accurate current measurements, keep the ACS712 module away from strong magnetic fields such as large transformers, motors, or permanent magnets, as these can interfere with Hall Effect sensing. Also ensure your power supply is a clean, stable 5V — voltage fluctuations can affect the output accuracy. Always route only the current-carrying wire (not the entire circuit) through the module's screw terminal for proper operation.\"}}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"5A \/ United States","offer_id":47710869291113,"sku":"14:10#5A;200007763:201336106","price":19.93,"currency_code":"USD","in_stock":true},{"title":"5A \/ spain","offer_id":47710869323881,"sku":"14:10#5A;200007763:201336104","price":13.38,"currency_code":"USD","in_stock":true},{"title":"5A \/ Australia","offer_id":47710869356649,"sku":"14:10#5A;200007763:201336099","price":16.63,"currency_code":"USD","in_stock":true},{"title":"5A \/ france","offer_id":47710869389417,"sku":"14:10#5A;200007763:201336342","price":16.87,"currency_code":"USD","in_stock":true},{"title":"20A \/ United States","offer_id":47710869422185,"sku":"14:29#20A;200007763:201336106","price":19.91,"currency_code":"USD","in_stock":true},{"title":"20A \/ spain","offer_id":47710869454953,"sku":"14:29#20A;200007763:201336104","price":13.41,"currency_code":"USD","in_stock":true},{"title":"20A \/ Australia","offer_id":47710869487721,"sku":"14:29#20A;200007763:201336099","price":16.66,"currency_code":"USD","in_stock":true},{"title":"20A \/ france","offer_id":47710869520489,"sku":"14:29#20A;200007763:201336342","price":16.92,"currency_code":"USD","in_stock":true},{"title":"30A \/ United States","offer_id":47710869553257,"sku":"14:94#30A;200007763:201336106","price":19.93,"currency_code":"USD","in_stock":true},{"title":"30A \/ spain","offer_id":47710869586025,"sku":"14:94#30A;200007763:201336104","price":13.38,"currency_code":"USD","in_stock":true},{"title":"30A \/ Australia","offer_id":47710869618793,"sku":"14:94#30A;200007763:201336099","price":16.63,"currency_code":"USD","in_stock":true},{"title":"30A \/ france","offer_id":47710869651561,"sku":"14:94#30A;200007763:201336342","price":16.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S5f257c792e014d18be22608cba19ccd9l.webp?v=1782061230","url":"https:\/\/oasis-select.com\/products\/acs712-hall-effect-current-sensor-module-5a-20a-30a","provider":"Oasis Select","version":"1.0","type":"link"}