{"product_id":"20v-4a-switching-power-supply-module-ac-dc-step-down-85-240v","title":"20V 4A AC-DC Switching Power Supply Module | 85-240V Step-Down","description":"\n\u003ch2\u003e20V 4A Switching Power Supply Board — Reliable AC-DC Step-Down Conversion\u003c\/h2\u003e\n\u003cp\u003eThis compact switching power supply module converts wide-range AC mains input (85–240V) to a stable 20V DC output at up to 4A, making it an excellent choice for DIY electronics projects, industrial automation, LED drivers, and embedded systems. Built-in overload and overvoltage protection safeguard both the module and your connected devices.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal AC Input:\u003c\/strong\u003e Accepts AC 85–240V — compatible with mains supplies worldwide.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStable 20V DC Output:\u003c\/strong\u003e Delivers a clean, regulated 20V at up to 4A (max 80W).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwitching Design:\u003c\/strong\u003e High-efficiency switch-mode architecture minimizes heat generation and energy loss compared to linear regulators.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverload Protection:\u003c\/strong\u003e Automatically limits current to protect your load and the module itself.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOvervoltage Protection:\u003c\/strong\u003e Shuts down output if voltage exceeds safe thresholds, preventing damage to sensitive components.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e At just 109 × 51 × 34 mm, it fits easily into enclosures and project builds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated Capacity:\u003c\/strong\u003e \u0026lt;40VA (EU LVD compliant — low voltage: below 50V AC or 75V DC).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo High-Concern Chemicals:\u003c\/strong\u003e Manufactured without restricted hazardous substances.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eAC 85–240V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOutput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e20V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOutput Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e4A (max)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eRated Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u0026lt;40VA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e109 × 51 × 34 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eProtection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eOverload \u0026amp; Overvoltage\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTopology\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px;border:1px solid #ddd;\"\u003eSwitch-Mode (AC-DC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × 20V 4A Switching Power Supply Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Due to lighting and screen differences, the item's color may appear slightly different from product photos. Please allow 1–10 mm tolerance due to manual measurement.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eFor guidance on electrical safety standards relevant to power supply modules, refer to the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety resources\u003c\/a\u003e and the \u003ca href=\"https:\/\/www.nist.gov\/topics\/electronics\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNIST Electronics \u0026amp; Electrical Engineering resources\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What input voltage range does this switching power supply module support?\u003c\/h4\u003e\n\u003cp\u003eA: The module accepts a wide AC input range of 85V to 240V, making it compatible with mains supplies across North America, Europe, Asia, and most other regions worldwide — no manual voltage selection required.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the maximum power output of this 20V AC-DC power supply board?\u003c\/h4\u003e\n\u003cp\u003eA: With a 20V output voltage and a maximum 4A output current, this module can deliver up to 80W of power. It is rated at \u0026lt;40VA under EU LVD guidelines, ensuring compliance with low-voltage safety standards.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How does the overload and overvoltage protection work?\u003c\/h4\u003e\n\u003cp\u003eA: The built-in overload protection automatically throttles or cuts the output current if the connected load draws more than the rated 4A, preventing the module from overheating or failing. The overvoltage protection circuit monitors the output rail and shuts down the module if the voltage rises above a safe threshold, protecting your connected electronics from damage.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this power supply module suitable for DIY and embedded electronics projects?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — the compact 109 × 51 × 34 mm board design, screw-terminal connections, and universal input range make it well-suited for DIY builds, LED driver systems, industrial control boards, Arduino\/Raspberry Pi power rails, and other custom electronics enclosures where a stable regulated 20V DC supply is needed.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What input voltage range does this switching power supply module support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module accepts a wide AC input range of 85V to 240V, making it compatible with mains supplies across North America, Europe, Asia, and most other regions worldwide — no manual voltage selection required.\"}}, {\"@type\": \"Question\", \"name\": \"What is the maximum power output of this 20V AC-DC power supply board?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"With a 20V output voltage and a maximum 4A output current, this module can deliver up to 80W of power. It is rated at \u0026lt;40VA under EU LVD guidelines, ensuring compliance with low-voltage safety standards.\"}}, {\"@type\": \"Question\", \"name\": \"How does the overload and overvoltage protection work?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The built-in overload protection automatically throttles or cuts the output current if the connected load draws more than the rated 4A, preventing the module from overheating or failing. The overvoltage protection circuit monitors the output rail and shuts down the module if the voltage rises above a safe threshold, protecting your connected electronics from damage.\"}}, {\"@type\": \"Question\", \"name\": \"Is this power supply module suitable for DIY and embedded electronics projects?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — the compact 109 × 51 × 34 mm board design, screw-terminal connections, and universal input range make it well-suited for DIY builds, LED driver systems, industrial control boards, Arduino\/Raspberry Pi power rails, and other custom electronics enclosures where a stable regulated 20V DC supply is needed.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"20V 4A AC-DC Switching Power Supply Module | 85-240V Step-Down\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/products\/20v-4a-switching-power-supply-module-ac-dc-step-down-85-240v\"}]}\u003c\/script\u003e","brand":"Vue","offers":[{"title":"Default Title","offer_id":48750131314880,"sku":"\u003cnone\u003e","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/9338\/7968\/files\/Sd6f1fa348a6a4ec7a6b4d31212614821d_a6443418-6d06-43ea-a241-5873326ab07d.webp?v=1786223747","url":"https:\/\/vueselect.com\/products\/20v-4a-switching-power-supply-module-ac-dc-step-down-85-240v","provider":"Vue","version":"1.0","type":"link"}