Wetting current for header connector

[cupoftea]

Hi,
We are dividing down 390Vdc to 2.5V, then feeding this to a PFC control chip (UCC28070A) which is on a daughter PCB, through the below header and socket housing.......there is no current going through the header pin.....is this OK?....or should we put the lower divider resistor on the daughter PCB, so that at least a few 100 microamps flows through the header connector? (to "wet" the contacts).

Internet re-searching this reveals a huge number of different opinions, without concensus, eg...

WETTING CURRENT IN CONNECTOR - Automotive Engineering other topics - Eng-Tips

Hello, I know that for a switch, it is needed a minimum of wetting current (normally 10mA). But is it needed for a connector? Imagine a plug-in module, there is

www.eng-tips.com

Pin header

https://uk.farnell.com/multicomp/mc34767/header-2-row-r-angle-8way/dp/1593450

Socket for pin header

https://uk.farnell.com/harwin/m20-7830446/socket-pcb-0-1-4-4way/dp/7991991

 

[KlausST]

Hi,

Wetting current is mainly for
* relay contacts, switch contacts
(Not pin header)
* with contact material that tends to oxidize
(gold does not tend to oxidize)

So neither the one nor the other relates to your pin header.
--> don't worry about wetting current

Klaus