This DC-DC boost module seems to be fairly popular due to its wide operational range, high power and low cost (about 3-5€ on aliexpress). It's build with an aluminium core PCB, to cool it can be attached to a heat sink with thermal adhesive tape.
It converts 9-48V to a maximum of 48V, the output power is rated at 250W but effectively limited by the max input current of 6A. The efficiency is about 90-95%.
I was curious on how it works, so I desoldered the inductor and reverese engineered the PCB. It was almost imposible to see the traces, the schematic was derived from a bunch of continuity tests, so there might not be 100% correct. Afterwards I did a quick performance test where I placed it on a small metal case. At 100W output the transistor temperature was only 45°C, at lower loads you propably won't need any extra heatsink at all. Not that this does not have over temperature protection build in, you must verify your application!
Your PCB looks to be a 2014 version, mine appears to be a
2018 version (only difference is R1 & R20 I think). Here's a piccy
of mine you could add if you wanted to help others.