I have a commercial device that normally operates at 5 volts and 425 milliamps. Sometimes the device can spike for a second or two and draw as much as 550 milliamps. I want to run this device on a computer USB 1 or 2 port that is rated for 5 volts and 500 milliamps. When this device spikes to 550 milliamps, do I run the risk of damaging a USB 1 or 2 computer port? Do USB 1 or 2 computer ports have some sort of protection against amperage spikes? What’s the maximum amperage a USB 1 or 2 computer port can tolerate without being damaged?

 

I imagine it has not changed since the last 2 times you asked the same question!

 

Hello,

Didn't you get enough info in your other threads?
Computer USB 1.0, 2.0 Safe Amp Output
USB 2 Output Power
Can A Computer USB 2.0 Port Run A Device Safely Above 500mA?

Bertus