aviation connectors



  • hiya i am looking to do a massive revamp on my cable management on 3d printer and enquiring about the specs of the aviation connectors more specifically the following:

    CX24 aviation connector for the steppers i.e. x, y, z, z1, e, e1

    GX20 14pin for the x carriage i.e. hotend wire, fan0, fan1, thermistor

    GX20 14pin for endstops i.e. x axis, y axis, z axis, fan2, fan3

    however way these connectors are fleshed out for my 3d printer can these connectors handle the currents, ohms and vattage of the hotend being a 70w cartridge, the nema 17 stepper motors.

    The heated bed will be a AC settup with the SSR.

    Please help



  • As far as I know, brand name aviation connectors are rated at 5 amps. Your guess is as good as mine in regard to chinese clones.
    Having said that, Creality uses a lot of aviation connectors and they seem to work well.
    I would re-think the idea of 14 pin connectors - have you ever tried soldering those guys? It's possible but you might not be able to put heat shrink on.
    I did not check the dimensions on CX and GX connectors ... I just know I use a lot of aviation connectors.
    I hope it goes without saying that you do not use those connectors for AC mains power (but SSR signal inputs are fine)



  • @jens55 said in aviation connectors:

    I hope it goes without saying that you do not use those connectors for AC mains power (but SSR signal inputs are fine)

    Some of them are rated for 4-500VAC and pass insulation testing with flying colours, have used them for years outside of 3d printing and have had less issues with them than say PowerCon.



  • If I am not mistaken, they are rated at 32 or 48V but each to their own. I would never use them for mains voltages unless they were brand name and were spec'd for that use. China imports do not qualify!



  • maybe I am reading it incorrectly, but when the specs sheet of the connector mentions 5 amps, does that mean 5 amp per a pin or 5 amp for the whole connection



  • generally pr pin; it may say something about derating the ampacity for elevated temperatures or when having high loads on all pins in a high pin density plug/wire.



  • might actually stick to the GX20 connector since that is mostly supported,





  • it that the pg to make the purchase



  • I am using these a lot (also the 2/3/5 pin versions)

    http://www.sah.co.rs/df16-a-4b.html

    c7335693-3e5d-4602-bf55-c77c034a3741-image.png

    b5758bfc-c1f3-4f82-bfdb-c27819544963-image.png

    they do not get warm at 5A 400V nor 5A 24V nor 5A 48V

    my insulation tester goes up to 1000V and 2000M ohm and do not trip them. I have somewhere around the 2500V version too but can't seem to find it but I guess 1000V is ok for a PRC connector


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