What's the maximum safe power supply voltage through GPIO?

Question

What is the maximum safe voltage to supply to the RPi when powering it through the GPIO pins?

Due to size restraints in a project, I need to supply power to my RPi through the GPIO pins instead of the micro USB plug. I plan on using a UBEC that provides 5V@3A. However, when I measured it, I found it's actually outputing 5.3V.

From this thread I read the RPi's "safe" input voltage range is 5V ±5% for a max safe voltage of 5.25V. Am I pushing it with 5.3V or should that be fine?

Answer 1

The Pi itself will be safe up to just less than 6V. I would not approach that limit too closely. Mine are often powered from circa 5.8V.

You would have to check any attached persipherals, e.g. USB, HDMI screen, on a case by case basis. As you say USB devices expect 4.75V to 5.25V. My USB wireless dongles work fine.

I'd be shocked if problems arose from a 5.3V supply.