Currently, we have developed a USB HUB Board.
When we manufactured 5EA for the first time, it worked normally. (Current: 50mA)
When we manufactured 10EA for the second time, 5EA worked normally, and 5EA had overcurrent. (Overcurrent: 450mA)
After analyzing the difference between the two boards, we found that all parts except for one part were from the same lot, and that one part was STL140N4LLF5.
When we swapped the STL140N4LLF5 part, the FET that caused the overcurrent occurred, so the overcurrent is occurring.
I purchased the two parts from Digi-Key and Mouser, and I would like to know what the difference is.
Thank you.
