Power Connector Housing

thingiverse

I believe it is always cleaner to be able to disconnect various electrical components quickly without tools. Low cost, high current connectors for low Voltage DC have been few and far between until several years ago when the industry introduced a quick disconnect connector designed for connecting high power stereo speakers like are used at concerts. These connectors are rated at 30 Amps and have 4 contacts, 2 labeled “+” and 2 labled “-”, which makes it ideal for connecting the power cable between the power supply and the motherboard (2 wires) and the bed heater mosfet switch (2 wires). The mosfet switch (Little Driver) I use is mounted in the housing pictured next to the power connector and is made by Digital Sqrt. These connectors are available from Digi-Key, Parts Express, Amazon, etc. in the US or slightly cheaper (< $2.50 USD per pair) from AliExpress in China. I have designed a housing to mount the bulkhead to the “2020” extruded rail base used on all Kossel delta printers along with a trim piece which hides the wires. The connector is secured to the housing with #2 X 3/8” sheet metal screws and the housing is connected to the base extrusions with M4 x 10 screws and M4 hammer T nuts.