2/25/2024 0 Comments Solder dupont connector![]() This is a connector that might be mistaken for a ‘DuPont’ connector, but is in fact a much better connector, with a bi-metal design including a BeCu leaf spring that is still produced by Amphenol today, including for the US military and other branches of the US government.īerg Electronics was purchased by DuPont Corporation in 1972, making it a division of the latter. (Credit: Matt Millman)Īccording to Matt Millman, Berg Electronics introduced their Mini-PV connector in the 1950s. De-constructed Mini-PV contact and Be-Cu leaf spring (left) and “DuPont” clone (right). One great example here is that of knock-off connectors, which one may amiably refer to as ‘DuPont Syndrome’, after a cheap clone of a much better connector, that became better known than the original. What the earlier example makes clear is that you have to be very cautious about exactly what you are buying: not just the tools, but also the components. The essential element of a good crimp is that of plastic deformation: the natural plasticity property of the materials in question and whether this plasticity is fully used to get a solid contact, but not (destructively) exceeded or – as in this case – barely used. Here the decision by Tower to save a few bucks ultimately lost them a lot of revenue, and endangered life and property. The Tower factory used not the specified AMP crimping machines, but improperly configured knock-off machines that created improper crimps. ![]() Due to insufficient pressure applied during crimping, spaces were left within the flag connector that increased the contact resistance.ĭrawing of large amounts of current, this would thus lead to rapid heat development and ultimately fire. Using units which had not caught on fire yet, the cause was tracked down to the flag connectors that were crimped on the stranded wires of the power cord. After multiple of reports of units catching on fire, it was deduced that it must have been faulty power cords from a new supplier: Tower.Īfter a recall of units with Tower-supplied power cords, the following legal battle and investigation tried to pin down the cause of the fires. All of these AC units were manufactured by a single Texan company: Goodman Co. Contrast with right crimp and lack of spacing.īack in December of 2007, air conditioning units installed at motels and apartments began to catch on fire, seemingly by themselves. The price tag for ‘saving a buck’ may end up being a lot higher than the money originally saved.Ī Cautionary Tale Example of the improper crimp (left) that caused fires in AC units. The same is true for genuine JST, Mini-PV and Molex connectors. The harsh truth is that, as ridiculous as the price tag on official JST and Mini-PV crimping tools may seem at hundreds of dollars each, they offer precise, repeatable crimps and reliable long-term stability. ![]() After all, it’s just a bit of metal that’s squeezed around some stripped wire. While browsing one’s favorite cheap shopping site, you may get the impression that all one has to do to join the world of crimp-awesome is order a $20 crimp tool and some assorted ‘JST’ and ‘DuPont’ (a Mini-PV clone) connectors to go with it. Crimp connectors provide an easy and convenient way to connect electronics while still allowing for them to be removed and swapped without having to reach for a soldering iron and desoldering wick.
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