{"product_id":"ac-dc-buck-step-down-power-supply-module-2a-adjustable-converter","title":"AC-DC Buck Step-Down Power Supply Module 2A Adjustable Converter","description":"\n\u003ch2\u003eAC-DC Buck Step-Down Power Supply Module – Adjustable 2A Converter with Rectifier Filter\u003c\/h2\u003e\n\u003cp\u003eThis compact and versatile \u003cstrong\u003eAC-DC Buck Power Supply Module\u003c\/strong\u003e is the ideal solution for electronics hobbyists, engineers, and DIY enthusiasts who need a reliable, adjustable regulated voltage output. Whether you're powering microcontrollers, sensors, or custom circuits, this step-down converter delivers stable DC output from both AC and DC input sources — all in a tiny 36 × 29 × 23 mm footprint.\u003c\/p\u003e\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose This Step-Down Converter?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Input Compatibility:\u003c\/strong\u003e Accepts AC input (5V–20V) via screw terminal AND DC input (5V–32V) via solder pad — maximum flexibility for your project.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Adjustable Output:\u003c\/strong\u003e Dial in any DC output from 3.3V to 18V to match the exact requirements of your circuit or device.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUp to 2A Output Current:\u003c\/strong\u003e Handles moderate current loads, making it suitable for a broad range of electronics projects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in Rectifier \u0026amp; Filter:\u003c\/strong\u003e The onboard rectifier and filter capacitors smooth out AC input, delivering clean, regulated DC output without external components.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClearly Labeled Terminals:\u003c\/strong\u003e Color-coded green screw terminals for AC input (AC), output positive (V+), and output ground (GND) make wiring fast and error-free. DC input pads are also clearly marked (V+ \/ V−).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-Compact Design:\u003c\/strong\u003e At just 36 × 29 × 23 mm, this module fits easily into enclosures, breadboards, and prototype assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAC Input Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAC 5V – 20V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDC Input Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 5V – 32V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 3.3V – 18V (adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Output Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions (L × W × H)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e36mm × 29mm × 23mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAC Input Terminal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen 2-position screw terminal (AC)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDC Output Terminals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eV+ (positive), GND (negative) screw terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDC Input Pads\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eV+ (positive), V− (negative) solder pads\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× AC-DC Buck Power Supply Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDue to lighting and screen color differences, the item's actual color may vary slightly from product images.\u003c\/li\u003e\n  \u003cli\u003ePlease allow 1–3 cm tolerances due to manual measurement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHelpful Resources\u003c\/h3\u003e\n\u003cp\u003eFor safe handling of electronic components and electrical DIY projects, refer to OSHA's electrical safety guidelines: \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Can this AC-DC buck module accept both AC and DC input simultaneously?\u003c\/h4\u003e\n\u003cp\u003eA: No, you should use either the AC input terminal (AC 5V–20V via screw terminal) or the DC input pad (DC 5V–32V) — not both at the same time. Choose the input that matches your power source for safe and correct operation.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I adjust the output voltage on this step-down converter?\u003c\/h4\u003e\n\u003cp\u003eA: The output voltage is adjusted via the onboard trimmer potentiometer. Turn it carefully while monitoring the output with a multimeter until you reach your desired voltage between 3.3V and 18V.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this buck module suitable for powering Arduino or Raspberry Pi projects?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! With a selectable output of 3.3V or 5V and up to 2A output current, this module is well-suited for powering microcontroller boards like Arduino and Raspberry Pi, as well as sensors, relays, and other low-voltage DIY electronics.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this module require any external components for filtering?\u003c\/h4\u003e\n\u003cp\u003eA: No additional filtering components are required. The module features a built-in rectifier and filter circuit, which converts AC input to smooth, regulated DC output internally.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Can this AC-DC buck module accept both AC and DC input simultaneously?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No, you should use either the AC input terminal (AC 5V–20V via screw terminal) or the DC input pad (DC 5V–32V) — not both at the same time. Choose the input that matches your power source for safe and correct operation.\"}}, {\"@type\": \"Question\", \"name\": \"How do I adjust the output voltage on this step-down converter?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The output voltage is adjusted via the onboard trimmer potentiometer. 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