Top critical review
13 people found this helpful
Out of spec - so don't always work
on 14 July 2013
I've never had any problems crimping these connectors, and I always get 100% connection on the cables (checked with a cable tester).
However, the IDC contacts are too shallow and, once crimped, sit too low in the plug. Compared with other RJ45 connectors the difference seems to be as much as 0.8mm.
In addition, they tend to be a little loose in most RJ45 sockets.
Although they do make satisfactory contact in some sockets, I've found quite a few where they do not and so cannot be used and I've ended up throwing a lot of them away.
<later> As a follow-up, I've checked the dimensions of the "crimp height" of these plugs and they are well outside the RJ45 specification - they vary from 5.40mm to 5.95mm (measured across 30 pins on stranded and solid conductors) - the RJ45 specification is 6.05-6.25mm
Also, checking the plug width there is considerable variation in these plugs. The RJ45 spec has the plug width between 11.58 and 11.83mm. The plugs I've measured vary from an out-of-spec 11.48mm to 11.67mm, so it's not surprising that they feel loose in some sockets.
I guess they are cheap, and some may have no problems with them, but I would certainly never use them again.