I have bought several DC Buck converters for my home-made 3D printer. I'm running a 24V PSU, but my fans are Noctua (12V) ones. So i want to convert 24V down to 12V. And the Voltage output works fine. however after several minutes the module gets really hot to the touch. Up to the point that it is not touchable with your base hands. Is this 'normal'?
The unit I'm talking about is this one: https://www.aliexpress.com/item/Hot-sale-Mini-360-DC-DC-Buck-Converter-Step-Down-Module-Mini360-4-75V-23V-to/32825363837.html