{"product_id":"dc-6v-40v-to-5v-3a-dual-usb-step-down-converter-module-lm2596","title":"DC 6V–40V to 5V 3A Dual USB Step-Down Converter Module","description":"\u003ch2\u003eDual USB Step-Down DC-DC Converter Module — Charge Two Devices at Once\u003c\/h2\u003e\n\u003cp\u003ePower and charge your USB devices anywhere with this compact \u003cstrong\u003eDC-DC step-down (buck) converter module\u003c\/strong\u003e. Accepting a wide input range of \u003cstrong\u003e6V to 40V\u003c\/strong\u003e, it efficiently steps voltage down to a steady \u003cstrong\u003e5V \/ 3A output\u003c\/strong\u003e — perfect for in-vehicle charging setups, solar power systems, DIY electronics projects, and portable power banks.\u003c\/p\u003e\n\u003cp\u003eFeaturing \u003cstrong\u003edual USB ports\u003c\/strong\u003e, this module lets you simultaneously charge two smartphones, tablets, or other 5V USB-powered devices from a single DC power source. The onboard \u003cstrong\u003eLM2596-based switching regulator\u003c\/strong\u003e delivers up to \u003cstrong\u003e92% efficiency\u003c\/strong\u003e, keeping heat low and battery drain to a minimum.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Voltage:\u003c\/strong\u003e DC 6V – 40V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Voltage:\u003c\/strong\u003e 5V (fixed)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Output Current:\u003c\/strong\u003e 3A (supports two devices simultaneously)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConversion Efficiency:\u003c\/strong\u003e Up to 92%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwitching Frequency:\u003c\/strong\u003e 150 kHz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -40°C to +85°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModule Dimensions:\u003c\/strong\u003e 59mm (L) × 21mm (W) × 17mm (H)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Ports:\u003c\/strong\u003e Dual USB Type-A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRegulator IC:\u003c\/strong\u003e LM2596\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho Is This For?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIY Electronics Enthusiasts\u003c\/strong\u003e — integrate into custom power supply projects\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVehicle Owners\u003c\/strong\u003e — add USB charging to cars, trucks, boats, or motorcycles with 12V\/24V systems\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSolar \u0026amp; Off-Grid Builders\u003c\/strong\u003e — step down panel or battery voltage to USB-friendly 5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Bank Builders\u003c\/strong\u003e — add dual USB output to your custom battery pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Choose This Module?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ Wide 6V–40V input — compatible with 12V, 24V, and beyond\u003c\/li\u003e\n  \u003cli\u003e✅ Charge two devices at the same time, up to 3A total\u003c\/li\u003e\n  \u003cli\u003e✅ High 92% efficiency — minimal wasted energy and heat\u003c\/li\u003e\n  \u003cli\u003e✅ Compact, lightweight, and easy to integrate\u003c\/li\u003e\n  \u003cli\u003e✅ Reliable LM2596 switching regulator for stable output\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eYou May Also Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10cm-wireless-led-motion-sensor-night-light-type-c-rechargeable-cabinet-wardrobe-lamp-for-staircase-backlight-kitchen-lighting\"\u003e10CM Wireless LED Motion Sensor Night Light – Type-C Rechargeable Cabinet \u0026amp; Wardrobe Lamp\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-100pcs-microfiber-towels-car-wash-drying-cloth-towel-household-cleaning-cloths-auto-detailing-polishing-cloth-home-clean-tools\"\u003eMicrofiber Towels for Car Wash \u0026amp; Auto Detailing\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.epa.gov\/recycle\/used-lithium-ion-batteries\" target=\"_blank\" rel=\"noopener\"\u003eEPA guidance on lithium-ion battery handling\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What input voltage range does this DC-DC step-down converter module support?\u003c\/h4\u003e\n\u003cp\u003eA: This module accepts a wide input range of \u003cstrong\u003eDC 6V to 40V\u003c\/strong\u003e, making it compatible with standard 12V and 24V vehicle electrical systems, as well as solar panels and other variable DC sources up to 40V.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I charge two devices at the same time with this dual USB converter?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The module features two USB Type-A output ports and supports a combined maximum output of \u003cstrong\u003e5V \/ 3A\u003c\/strong\u003e, allowing you to charge two smartphones or similar USB-powered devices simultaneously.\u003c\/p\u003e\n\u003ch4\u003eQ: How efficient is this step-down converter, and will it get hot during use?\u003c\/h4\u003e\n\u003cp\u003eA: The LM2596-based switching regulator achieves up to \u003cstrong\u003e92% conversion efficiency\u003c\/strong\u003e, which means very little energy is lost as heat. The module also has a wide operating temperature tolerance of -40°C to +85°C, making it reliable in a variety of environments.\u003c\/p\u003e\n\u003ch4\u003eQ: What types of devices can I power or charge with this module?\u003c\/h4\u003e\n\u003cp\u003eA: Any USB 5V-powered device is compatible — including smartphones, tablets, Bluetooth speakers, GPS units, dash cameras, and more. It's ideal for vehicle chargers, DIY power banks, and off-grid solar charging setups.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\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 DC-DC step-down converter module support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This module accepts a wide input range of DC 6V to 40V, making it compatible with standard 12V and 24V vehicle electrical systems, as well as solar panels and other variable DC sources up to 40V.\"}}, {\"@type\": \"Question\", \"name\": \"Can I charge two devices at the same time with this dual USB converter?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! 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