Electronics > Projects, Designs, and Technical Stuff
[advice] Crimp butt connectors for thin wire (~ 0.6 mm dia)
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onesixright:
Hi All,

I need to connect some  "magnetic detectors" (alarm door/window connectors). Its stranded wire, ~ 0.6 mm. Pretty thin.

I was thinking of using "insulated butt crimp" connectors. Since the wires are pretty thin, any better solutions?

Thanks!

Rog.
hexreader:
Solder and heat-shrink - possibly two layers of heat-shrink if you want a stiff join

Stagger the joints if there is more than one wire within outer heat-shrink
MarkL:

--- Quote from: onesixright on March 14, 2020, 03:12:44 pm ---...
I was thinking of using "insulated butt crimp" connectors. Since the wires are pretty thin, any better solutions?

--- End quote ---
If you mean you were thinking of 3M Scotchlok UR and UY series butt connectors, those are the ones that telephone installers use.  They are great for any environment and I would use them.  They are not rated for stranded, but I've never had an issue using them on stranded.

You can find the 3M ones and tons of look-alikes on Amazon.  Search for "idc connector ur uy":

  https://www.amazon.com/s?k=idc+connector+ur+uy

EDIT: Fixed up url.

onesixright:
Thanks both!

Problem is with soldering: its around the house, and soldering on a ladder doesn't seem like a great plan. The magnets are already installed and wire length is only ~ 30 cm. S

I was thinking of the crimping ones used in automotive industry. The wire/connector will be place above the door/window frame. This will be closed later with plaster. I will make a photo this weekend, since its a bit hard to explain.

Again, thanks so far.



Gregg:

Dolphin connectors https://www.amazon.com/Dolphin-DC-100S-Super-Connector-Sealant/dp/B000JP3GB6 are typically used for these type of installations.  They are available with moisture resistant grease in them and crimp nicely with any decent pliers.  They have internal teeth that are supposed to bite through insulation, but I strip the wires, twist them together before inserting and crimping.  They are a lot easier to use than butt connectors for thin wire and will even splice solid and solid to stranded connections.
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