![]() ![]() These require a cable that also has two chamfered pins (chamfered male requires chamfered female, but square male will mate with either chamfered or square female) like this one:Ĭlearly there are a lot of subtleties here. However there are exceptions! I've come across GPUs before with the connector below that have two chamfered pins in the middle column: ![]() Another example is the 6-pin male PCIe connector shown below: The ATX connector above is a great example of this. This means that for a two-row connector with n pins there are 2^(n/2) possible keyings. However it also helps prevent insertion of incompatible connectors: for the vast majority of connectors in this family, each column of two pins has one chamfered and one un-chamfered pin. Right off the bat that prevents upside-down insertion so long as the male connector (which has a female housing) contains at least one chamfered pin. You'll notice that some of the pins are square and some are chamfered. After using and examining a lot of them, there appears to be a method to the madness of the keying. There must be a generic term I'm not a lawyer and don't want to devolve this into amateur legal debates, but my understanding is that in order to maintain a trademark ("Kleenex", "Xerox") there must be a generic term for the product ("Tissue", "Photocopier") if one doesn't exist then Molex can't enforce their trademark on "Mini-Fit(tm) Jr(tm)"Īdditionally, I'm hoping to find the standard that specifies these connectors. I would like to be able to search for connectors in this family without limiting myself to Molex products, which are the only ones that can use the trademarked term "Mini-Fit Jr". But the other manufacturers list their products under nothing more than a long sequence of digits, like TE's "1586041-6". ![]() These connectors are manufactured by several other companies (AMP, TE, FCI, Amphenol, etc) so it's not a Molex-proprietary technology, and I don't think it would have become so widespread if it were anyways. What is the non-trademarked generic name for this family of connectors? This started with the venerable ATX power supply connector shown below:Īnd continued with a wide variety of other power connectors, notably the 6-pin and 8-pin PCIe auxiliary power connectors used by GPUs (pictures below). The PC industry uses a large variety of power connectors which were originally introduced by Molex, using their trademarked (and search-engine unfriendly) brand name "Molex Mini-Fit Jr". ![]()
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