{"product_id":"dc-dc-step-down-converter-dual-usb-5v-3a-6v-40v-solar-vehicle","title":"DC-DC Step-Down Converter Dual USB 5V 3A | 6V–40V Input","description":"\n\u003ch2\u003eDC-DC Step-Down Converter Module with Dual USB Output — 6V–40V to 5V 3A\u003c\/h2\u003e\n\u003cp\u003ePower two devices at once from virtually any DC source with this compact, high-efficiency step-down (buck) converter module. Whether you're running it off a solar panel, a 12V\/24V vehicle system, or any DC supply between 6V and 40V, this little board steps the voltage down to a clean, stable 5V at up to 3A — perfect for charging smartphones, tablets, power banks, and other USB-powered devices on the go.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Efficiency — Up to 92%:\u003c\/strong\u003e The advanced switching design delivers up to 92% power conversion efficiency, minimising heat and energy waste for faster, more reliable charging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual USB Ports:\u003c\/strong\u003e Two USB-A outputs let you charge two devices simultaneously. Total combined output is 5V \/ 3A (max), with built-in identification resistors for broad device compatibility.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Input Range (6V–40V DC):\u003c\/strong\u003e Compatible with a huge variety of sources — solar panels, lead-acid and lithium battery banks, vehicle 12V\/24V rails, and more. Input via standard 5.5×2.1 mm DC barrel jack.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e Measures just 50 × 35 × 12 mm and weighs next to nothing, making it ideal for embedded installations, DIY projects, and portable setups.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature:\u003c\/strong\u003e Rated from −40 °C to +85 °C, so it performs reliably in harsh environments — under the bonnet, in an outdoor solar enclosure, or in extreme cold.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncludes Wiring Lead:\u003c\/strong\u003e Comes with a pre-attached wire for quick, hassle-free installation.\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\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6V – 40V DC (5.5×2.1 mm barrel jack)\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 max\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConversion Efficiency\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\u003eColour\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed PCB\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 × DC-DC Step-Down Converter Module (Dual USB)\u003c\/li\u003e\n  \u003cli\u003e1 × Wiring Lead\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSolar charge controllers and off-grid solar setups\u003c\/li\u003e\n  \u003cli\u003e12V \/ 24V vehicle USB charging (cars, trucks, caravans, boats)\u003c\/li\u003e\n  \u003cli\u003eDIY electronics projects and embedded systems\u003c\/li\u003e\n  \u003cli\u003ePortable battery packs and power banks\u003c\/li\u003e\n  \u003cli\u003eRemote monitoring stations and outdoor IoT devices\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\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 further information on safe electrical and electronic component standards, visit the U.S. Consumer Product Safety Commission (CPSC).\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Electric_power_conversion\" target=\"_blank\" rel=\"noopener\"\u003eElectric power conversion\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Can this step-down converter module handle a 24V vehicle or solar panel input?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — the module accepts any DC input from 6V to 40V, making it fully compatible with 12V and 24V vehicle systems as well as most solar panels and battery banks. It steps the voltage down to a stable 5V output regardless of the input voltage within that range.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I charge two devices at the same time using both USB ports?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. Both USB-A ports can be used simultaneously. The total combined output is 5V at up to 3A, so two devices sharing the load will each receive up to the amperage their own circuitry requests, up to the 3A combined maximum.\u003c\/p\u003e\n\u003ch4\u003eQ: What type of connector does the input use?\u003c\/h4\u003e\n\u003cp\u003eA: The input uses a standard 5.5×2.1 mm DC barrel jack, which is one of the most common connector types used in solar controllers, power adapters, and DIY electronics. The included wiring lead makes it easy to hardwire directly into your project or vehicle.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this module suitable for outdoor or in-vehicle use?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. With an operating temperature range of −40 °C to +85 °C, the module handles extreme heat and cold well, making it suitable for under-bonnet vehicle installations, outdoor solar enclosures, and off-grid remote setups.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Can this step-down converter module handle a 24V vehicle or solar panel input?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — the module accepts any DC input from 6V to 40V, making it fully compatible with 12V and 24V vehicle systems as well as most solar panels and battery banks. It steps the voltage down to a stable 5V output regardless of the input voltage within that range.\"}}, {\"@type\": \"Question\", \"name\": \"Can I charge two devices at the same time using both USB ports?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Absolutely. Both USB-A ports can be used simultaneously. The total combined output is 5V at up to 3A, so two devices sharing the load will each receive up to the amperage their own circuitry requests, up to the 3A combined maximum.\"}}, {\"@type\": \"Question\", \"name\": \"What type of connector does the input use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The input uses a standard 5.5×2.1 mm DC barrel jack, which is one of the most common connector types used in solar controllers, power adapters, and DIY electronics. The included wiring lead makes it easy to hardwire directly into your project or vehicle.\"}}, {\"@type\": \"Question\", \"name\": \"Is this module suitable for outdoor or in-vehicle use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. With an operating temperature range of −40 °C to +85 °C, the module handles extreme heat and cold well, making it suitable for under-bonnet vehicle installations, outdoor solar enclosures, and off-grid remote setups.\"}}]}\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-DC Step-Down Converter Dual USB 5V 3A | 6V–40V Input\", \"item\": \"https:\/\/oasis-select.com\/products\/dc-dc-step-down-converter-dual-usb-5v-3a-6v-40v-solar-vehicle\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"A","offer_id":47748686151785,"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_2a32c09d-986e-4c73-a883-dd169bf51dca.webp?v=1783087532","url":"https:\/\/oasis-select.com\/products\/dc-dc-step-down-converter-dual-usb-5v-3a-6v-40v-solar-vehicle","provider":"Oasis Select","version":"1.0","type":"link"}