5-Pack DC-DC Buck Modules – USB Charger 6-24V To 5V, 3A Max Output For Car, DIY Projects

Need to power USB devices from a higher voltage source? This 5-pack of DC-DC buck modules is super handy for DIY electronics, car charging setups, or solar projects. They take an input voltage from 6V all the way up to 24V and output a steady 5.1–5.2V, perfect for charging phones, tablets, or powering small gadgets.

Each module is tiny – about 26.4 x 15 x 7.4mm – but packs a punch with up to 3 amps of output current. They use synchronous rectification, which makes them really efficient (up to 97.5%) and helps them run cool. There's reverse polarity protection built in, so if you hook up the wires backward, it won't fry the module.

The quiescent current is super low – only 0.85mA – so you can leave it connected in your car without worrying about draining the battery. It's got a red LED to show when it's outputting power, and the USB port is solid and well-made. At full load (3A), you might want to add a little heatsink, but for most uses like 2A charging, it's fine without.

Great for wiring into a car's 12V system, building portable power banks, or integrating into custom electronics. Comes as a set of five, so you can use them in multiple projects or have spares on hand. Just remember: input 6–24V DC, output 5V, max 3A.