Review on 💡 MEAN WELL HDR-15-12 Ultra Slim Step-Shape 1SU DIN Rail Power Supply: 12V 1.25A 15W, Compact and Efficient by Michael Tegan

This is a very good and compact power supply, but the 80ms rise time is longer than most comparable power supplies. This measurement shows how long it takes for the voltage to reach the specified output value after the "setup" time, which is the delay from when the power is applied until the power is turned on. Depending on your hardware, this can cause problems. I wanted to use it to power an ESP32 based GPIO controller and with this power supply after being idle for more than a few minutes the output to full power is slow enough to power the ESP32 into the firmware Download mode instead of going into normal startup. . . The extra fast power cycles work well, but it seems to be taking too long after the internal capacitors in the power supply are fully discharged to reach the full output voltage for my application. It works great every time with Meanwell DR-15-12 with 50ms rise time or MDR-20-12 with 30ms rise time. This probably won't be a problem for most devices, but if you're having weird trouble turning it on after it's been off for more than a few minutes, then that might be the problem and you should try one of the others. This is definitely an issue, at least for some ESP32 based devices.