A friend of mine asked me to look at a failed folding machine he uses in his printing business. Once I got to the bottom of the problem, I found that I needed to step down a 48V supply to 5V. Having found this product on Amazon, I gave it a try. After bench testing at various input voltages and output loads, I was confident that this Buck converter was suitable and was delivering exactly as advertised. Also, there was no real notable load overhead.The plastic encloser with mounting points turned out to be a perfect fit (by chance) with the added benefit of protecting the circuitry, as you can see in the photos. This, along with a custom PCB solved the problem perfectly; and, I would argue, better than the machine's original PCB design.For clarity, the transformer you can see in the photos does not directly connect directly to the Buck converter. It connected via the original PCB which incorporates an AC-DC bridge rectification and therefore providing 48V DC which I fed to the Input side of the Buck converter.PKAE Electronics.

I bought this because I have a project involving a 45V high power LED array controlled (via MOSFETs) by an Arduino Nano microcontroller, which needs a 5V supply. I wanted to use a single power supply and most 5V_out buck convertors out there seem limited to 36V_in so this fitted the bill.With a 45V DC input I get 5.13V_out open circuit dropping to 5.06V with a 50 ohm load (ie 100mA output) so it's good for this sort of application.

Used in my camper van to install a USB socket to my 24v power.