{"product_id":"18v-3a-ac-dc-switching-power-supply-module-54w-step-down","title":"18V 3A AC-DC Switching Power Supply Module 54W Step-Down","description":"\n\u003ch2\u003e18V 3A AC-DC Switching Power Supply Board – 54W Step-Down Converter Module\u003c\/h2\u003e\n\u003cp\u003ePower your electronics projects with confidence using this compact yet capable 54W switching power supply board. Designed to convert AC mains voltage (85–240V) down to a stable 18V DC output at up to 3A, this module is an ideal drop-in solution for DIY electronics, automation systems, LED drivers, industrial control boards, and more. Built-in overcurrent protection keeps your circuits and connected devices safe during unexpected load spikes.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide AC Input Range:\u003c\/strong\u003e Accepts AC 85V–240V, making it compatible with power grids worldwide.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStable 18V DC Output:\u003c\/strong\u003e Delivers a clean, regulated 18V at up to 3A for consistent performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e54W Rated Power:\u003c\/strong\u003e Handles demanding loads across a variety of electronics and embedded applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-In Overcurrent Protection:\u003c\/strong\u003e Automatically safeguards your circuits from excessive current draw.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e Measures just 90 × 45 × 28 mm — easy to integrate into enclosures, panels, or project builds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwitching Design:\u003c\/strong\u003e High-efficiency switching topology reduces energy waste and heat generation compared to linear regulators.\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 style=\"background:#f5f5f5;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eAC 85V – 240V\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOutput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e18V 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\u003eOutput Current\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e3A (max)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eRated Power\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e54W\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e90 × 45 × 28 mm\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eProtection\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eOvercurrent Protection\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× 18V 3A Switching Power Supply Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eColors may vary slightly from product images due to lighting and display differences.\u003c\/li\u003e\n  \u003cli\u003ePlease allow a tolerance of 1mm–1cm due to manual measurement.\u003c\/li\u003e\n  \u003cli\u003eThis module operates at mains voltage. Always follow proper electrical safety practices during installation. Refer to \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA's Electrical Safety Guidelines\u003c\/a\u003e for best practices when working with AC-powered electronics.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What input voltage range does this AC-DC power supply module support?\u003c\/h4\u003e\n\u003cp\u003eA: This switching power supply board accepts a wide AC input range of 85V to 240V, making it fully compatible with standard mains voltage in North America, Europe, Asia, and most other regions worldwide.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this 18V power supply module suitable for DIY and hobbyist electronics projects?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. Its compact 90 × 45 × 28 mm footprint, screw-terminal connections, and broad input range make it a popular choice for DIY electronics, embedded systems, automation controllers, LED strip drivers, and custom enclosure builds requiring a stable 18V DC supply.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does the built-in overcurrent protection do?\u003c\/h4\u003e\n\u003cp\u003eA: The overcurrent protection feature monitors the output current and automatically limits or shuts down the output if the current draw exceeds safe levels. This protects both the module itself and any connected components from damage during short circuits or unexpected load spikes.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How efficient is a switching power supply compared to a linear regulator?\u003c\/h4\u003e\n\u003cp\u003eA: Switching power supplies like this module are significantly more efficient than traditional linear regulators — typically achieving 80–90%+ efficiency — meaning they convert most of the input power to usable DC output rather than dissipating it as heat. This makes them ideal for enclosed or space-constrained builds.\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 AC-DC power supply module support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This switching power supply board accepts a wide AC input range of 85V to 240V, making it fully compatible with standard mains voltage in North America, Europe, Asia, and most other regions worldwide.\"}}, {\"@type\": \"Question\", \"name\": \"Is this 18V power supply module suitable for DIY and hobbyist electronics projects?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Absolutely. 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This makes them ideal for enclosed or space-constrained builds.\"}}]}\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\": \"18V 3A AC-DC Switching Power Supply Module 54W Step-Down\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/products\/18v-3a-ac-dc-switching-power-supply-module-54w-step-down\"}]}\u003c\/script\u003e","brand":"Vue","offers":[{"title":"Default Title","offer_id":48746853400768,"sku":"\u003cnone\u003e","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/9338\/7968\/files\/Saecaf99703464131b95466b547ac47e6R.webp?v=1786195595","url":"https:\/\/vueselect.com\/products\/18v-3a-ac-dc-switching-power-supply-module-54w-step-down","provider":"Vue","version":"1.0","type":"link"}