6–40V to 5V 3A Dual USB Step-Down Charger

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6–40V → 5V 3A dual USB step-down — turn a car, scooter, solar, or bench DC rail into clean USB charge ports for phones and 5V gadgets while you work.

Handy on the repair desk when you need USB power from a higher DC supply without another wall wart cluttering the station.

Model: Dual USB (default) or DC5.5 barrel variant from the dropdown.

Features

- Wide DC input about 6–40V; fixed 5V USB output up to about 3A class

- Dual USB-A ports on the preferred board (plus screw-terminal input)

- Optional DC5.5 model for barrel-jack style installs

- LM2596-class step-down for vehicle / battery / bench USB taps

- Compact red PCB — easy to mount in a fixture or project box

How to use

- Choose Dual USB or DC5.5 from the product options before add to cart

- Confirm input polarity (IN+ / IN−); stay inside the 6–40V window

- Plug phones / pads / 5V tools into the USB ports (share the ~3A budget)

- Do not feed AC mains; this is a DC-to-DC USB board only

Typical jobs: USB charge from a car / battery pack, dual-port 5V on a repair station, solar or DIY 5V taps.