{"product_id":"dc-9v-120v-to-5v-12v-3a-step-down-buck-converter-module","title":"DC 9V–120V to 5V\/12V 3A Step-Down Buck Converter Module","description":"\u003ch2\u003eDC 9V–120V to 5V \/ 12V 3A Step-Down Buck Converter Module\u003c\/h2\u003e\n\u003cp\u003eTackle any wide-voltage DC power project with confidence. This compact step-down (buck) converter module accepts a wide input range of \u003cstrong\u003e9V to 120V DC\u003c\/strong\u003e and delivers a stable, regulated output of either \u003cstrong\u003e5V or 12V at up to 3A\u003c\/strong\u003e — all in a palm-sized 40×30×19mm package. Ideal for electronics hobbyists, engineers, DIY builds, robotics, solar systems, electric bikes, and industrial automation projects.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-Wide Input Range:\u003c\/strong\u003e Accepts DC 9V–120V (covers 9V, 12V, 24V, 36V, 48V, 72V, 84V, 120V sources)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Output Options:\u003c\/strong\u003e Choose 5V 3A or 12V 3A output to suit your application\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Efficiency:\u003c\/strong\u003e Up to 95% conversion efficiency — less heat, more power delivered\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConstant Voltage \u0026amp; Constant Current Output:\u003c\/strong\u003e Stable, reliable power for sensitive electronics\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-In Protections:\u003c\/strong\u003e Over-temperature, over-current, and short-circuit protection keep your devices safe\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-In Soft Start:\u003c\/strong\u003e Prevents inrush current spikes on startup\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Standby Current:\u003c\/strong\u003e Energy-efficient even when lightly loaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdaptive Frequency:\u003c\/strong\u003e Reduces switching frequency under light load to maximise light-load efficiency\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Size:\u003c\/strong\u003e 40 × 30 × 19 mm — fits easily into enclosures and project boxes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 9V – 120V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V or 12V (select variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Output Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Recommended Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30W\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Input–Output Differential\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4V (5V output) \/ 4V (12V output, min. input 16V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSwitching Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTypical 140 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEfficiency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 95%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModule Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40 × 30 × 19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterials\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePlastic + Metal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 × Step-Down Converter Module\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eFor a 5V output: ensure input is between DC 9V–120V (minimum 4V above output).\u003c\/li\u003e\n  \u003cli\u003eFor a 12V output: ensure input is between DC 16V–120V.\u003c\/li\u003e\n  \u003cli\u003eWhen using output voltages greater than 12V (custom), current will be lower than 3A; keep total power under 30W.\u003c\/li\u003e\n  \u003cli\u003eSlight colour variation from product images may occur due to monitor and lighting differences.\u003c\/li\u003e\n  \u003cli\u003eAllow ±1–2mm measurement tolerance for stated dimensions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/25-in-1-precision-magnetic-screwdriver-set-pro-repair-tool-kit\"\u003e25-in-1 Precision Magnetic Screwdriver Set | Pro Repair Kit\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/waterproof-cable-gland-set-pg7-pg9-nylon-connectors-10-pack\"\u003e10-Pack Waterproof Cable Glands PG7 PG9 Nylon Connectors\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/34-compartment-double-sided-hardware-storage-box-removable-dividers\"\u003e34-Compartment Double-Sided Hardware Storage Box \u0026amp; Dividers\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What input voltage range does this step-down buck converter module support?\u003c\/h4\u003e\n\u003cp\u003eA: This DC-DC step-down converter module supports a wide input voltage range of \u003cstrong\u003eDC 9V to 120V\u003c\/strong\u003e, making it compatible with a huge variety of power sources including 12V, 24V, 36V, 48V, 72V, 84V, and 120V DC systems.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I use this module for both 5V and 12V output?\u003c\/h4\u003e\n\u003cp\u003eA: The module is available in two output variants — \u003cstrong\u003e5V 3A\u003c\/strong\u003e and \u003cstrong\u003e12V 3A\u003c\/strong\u003e. Select the variant that matches your required output voltage when ordering. For the 12V output version, a minimum input of 16V DC is required to maintain the 4V differential.\u003c\/p\u003e\n\u003ch4\u003eQ: What protection features are built into this converter?\u003c\/h4\u003e\n\u003cp\u003eA: The module includes built-in \u003cstrong\u003eover-temperature, over-current, and short-circuit protection\u003c\/strong\u003e, as well as a soft-start function to prevent startup current surges. These features help safeguard both the module and any connected devices.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the maximum recommended power output for this module?\u003c\/h4\u003e\n\u003cp\u003eA: The maximum continuous output current is \u003cstrong\u003e3A\u003c\/strong\u003e. It is recommended to keep total power under \u003cstrong\u003e30W\u003c\/strong\u003e for reliable, long-term operation, especially at higher output voltages.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What input voltage range does this step-down buck converter module support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This DC-DC step-down converter module supports a wide input voltage range of DC 9V to 120V, making it compatible with a huge variety of power sources including 12V, 24V, 36V, 48V, 72V, 84V, and 120V DC systems.\"}}, {\"@type\": \"Question\", \"name\": \"Can I use this module for both 5V and 12V output?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module is available in two output variants — 5V 3A and 12V 3A. Select the variant that matches your required output voltage when ordering. 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It is recommended to keep total power under 30W for reliable, long-term operation, especially at higher output voltages.\"}}]}\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:\/\/sdf9i0-k1.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Components \u0026 Modules\", \"item\": \"https:\/\/sdf9i0-k1.myshopify.com\/collections\/components-modules\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"DC 9V–120V to 5V\/12V 3A Step-Down Buck Converter Module\", \"item\": \"https:\/\/sdf9i0-k1.myshopify.com\/products\/dc-9v-120v-to-5v-12v-3a-step-down-buck-converter-module\"}]}\u003c\/script\u003e","brand":"QXL","offers":[{"title":"12V 3A","offer_id":46964138377415,"sku":"14:350853#12V 3A","price":14.99,"currency_code":"USD","in_stock":true},{"title":"5V 3A","offer_id":46964138410183,"sku":"14:350850#5V 3A","price":14.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0799\/8314\/9255\/files\/S66bf004f34df4e9a8309acec618b60d05.webp?v=1786056670","url":"https:\/\/qxlcustomerservice.com\/products\/dc-9v-120v-to-5v-12v-3a-step-down-buck-converter-module","provider":"QXL","version":"1.0","type":"link"}