{"product_id":"dc-6v-40v-to-5v-3a-dual-usb-step-down-converter-module-solar-vehicle","title":"DC 6V–40V to 5V 3A Dual USB Step-Down Converter Module","description":"\n\u003ch2\u003eDC 6V–40V to 5V 3A Dual USB Step-Down Converter Module\u003c\/h2\u003e\n\u003cp\u003ePower two USB devices simultaneously from solar panels, vehicles, or any DC source between 6V and 40V. This compact DC-DC step-down (buck) converter module delivers a stable 5V\/3A output with up to \u003cstrong\u003e92% conversion efficiency\u003c\/strong\u003e — keeping your phones, tablets, and other USB gadgets charged wherever you are. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Efficiency:\u003c\/strong\u003e Up to 92% power conversion efficiency minimises energy waste and heat build-up, making the most of every watt from your solar panel or vehicle battery.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual USB Output:\u003c\/strong\u003e Two USB-A ports deliver a combined maximum of 5V\/3A, letting you charge two devices at the same time — ideal for phones, tablets, and power banks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Input Range (6V–40V DC):\u003c\/strong\u003e Compatible with 12V\/24V vehicle systems, solar charge controllers, and a broad range of DC power sources. Input connector: 5.5×2.1 mm barrel jack plus included wire leads.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Lightweight:\u003c\/strong\u003e At just 50 × 35 × 12 mm and a red PCB design, this module fits neatly into enclosures, DIY builds, or project boxes without taking up valuable space.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad Device Compatibility:\u003c\/strong\u003e Supports any USB 5V device — smartphones, tablets, portable speakers, GPS units, and more.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature:\u003c\/strong\u003e Rated from –40 °C to +85 °C, performing reliably in harsh outdoor or automotive environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFull Specifications\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\u003e6V–40V DC (5.5×2.1 mm port)\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 (fixed)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3A maximum\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 92%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSwitching Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e–40 °C to +85 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50 × 35 × 12 mm (L × W × H)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed PCB\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\u003eMade in Mainland 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 × Dual USB Step-Down Converter Module\u003c\/li\u003e\n  \u003cli\u003e1 × Wire (pre-attached leads)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal Use Cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSolar charging systems and solar controller projects\u003c\/li\u003e\n  \u003cli\u003e12V\/24V vehicle USB charging in cars, trucks, RVs, and boats\u003c\/li\u003e\n  \u003cli\u003eDIY electronics, maker projects, and embedded power supplies\u003c\/li\u003e\n  \u003cli\u003eOff-grid and outdoor charging setups\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\/1-channel-relay-module-dc-3-3v-24v-optocoupler-arduino\"\u003e1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-scr-solid-state-relay-switch-module-dc3-24v-40a-optocoupler\"\u003e1-Channel SCR Solid State Relay Module DC3-24V 40A Optocoupler\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-25mm-1000-turn-precision-copper-inductor-coil-diy-electronics\"\u003e0.25mm 1000-Turn Precision Copper Inductor Coil for DIY Circuits\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more information on electrical safety standards for DC power conversion modules, visit the U.S. Consumer Product Safety Commission (CPSC).\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Power_inverter\" target=\"_blank\" rel=\"noopener\"\u003ePower inverter\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What input voltage range does this dual USB step-down converter module support?\u003c\/h4\u003e\n\u003cp\u003eA: The module accepts a wide DC input from 6V to 40V, making it compatible with 12V car batteries, 24V truck systems, solar panels, and other common DC power sources. The input is via a 5.5×2.1 mm barrel connector plus wire leads.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I charge two devices at the same time with this module?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The module features two USB-A output ports with a combined maximum output of 5V\/3A. You can charge two smartphones, tablets, or other USB 5V devices simultaneously.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this module suitable for solar panel installations?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. With a wide 6V–40V input range and up to 92% efficiency, this converter is an excellent choice for integrating USB charging into solar controller setups, off-grid systems, or portable solar chargers.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the physical size of the module?\u003c\/h4\u003e\n\u003cp\u003eA: The module measures 50 × 35 × 12 mm (length × width × height), making it very compact and easy to integrate into custom enclosures, DIY project boxes, or vehicle dashboards.\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 dual USB step-down converter module support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module accepts a wide DC input from 6V to 40V, making it compatible with 12V car batteries, 24V truck systems, solar panels, and other common DC power sources. The input is via a 5.5×2.1 mm barrel connector plus wire leads.\"}}, {\"@type\": \"Question\", \"name\": \"Can I charge two devices at the same time with this module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! The module features two USB-A output ports with a combined maximum output of 5V\/3A. You can charge two smartphones, tablets, or other USB 5V devices simultaneously.\"}}, {\"@type\": \"Question\", \"name\": \"Is this module suitable for solar panel installations?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Absolutely. With a wide 6V–40V input range and up to 92% efficiency, this converter is an excellent choice for integrating USB charging into solar controller setups, off-grid systems, or portable solar chargers.\"}}, {\"@type\": \"Question\", \"name\": \"What is the physical size of the module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module measures 50 × 35 × 12 mm (length × width × height), making it very compact and easy to integrate into custom enclosures, DIY project boxes, or vehicle dashboards.\"}}]}\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:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/oasis-select.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"DC 6V–40V to 5V 3A Dual USB Step-Down Converter Module\", \"item\": \"https:\/\/oasis-select.com\/products\/dc-6v-40v-to-5v-3a-dual-usb-step-down-converter-module-solar-vehicle\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"A","offer_id":47748631789673,"sku":"14:200001438#A","price":7.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/Sb64ef3e4a2d14222acd030e1cd4091ffy.webp?v=1783087122","url":"https:\/\/oasis-select.com\/products\/dc-6v-40v-to-5v-3a-dual-usb-step-down-converter-module-solar-vehicle","provider":"Oasis Select","version":"1.0","type":"link"}