Author Topic: Aliexpress jump wire  (Read 713 times)

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Offline PartialDischargeTopic starter

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Aliexpress jump wire
« on: January 23, 2025, 09:23:34 am »
Bought a couple of Ali jump wire mainly because it is advertised as very thin but its not true and the main problem is that is does not solder easily either:

Mechanic FXV009:
 -advertised as 9um, real diameter 30um
 -does not make electrical contact with DMM probes
 -hard to solder, takes a few seconds, after which it makes electrical contact at the solder joints

Sunshine SS-007E:
 -advertised as 7um, real diameter 25um
 -does not make electrical contact with DMM probes
 -hard to solder, takes a few seconds, after which it makes electrical contact at the solder joints

These wires are probably 100% Aluminum with no silver in them

« Last Edit: January 23, 2025, 12:45:43 pm by PartialDischarge »
 

Online jpanhalt

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Re: Aliexpress jump wire
« Reply #1 on: January 23, 2025, 10:46:05 am »
How did you measure the diameter?
 

Offline PartialDischargeTopic starter

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Re: Aliexpress jump wire
« Reply #2 on: January 23, 2025, 10:48:47 am »
Digital micrometer. Also I was suspicious about the diameter because I have 15um real bonding wire for ICs and it is very difficult to see and to work with. And these wires are clearly thicker
« Last Edit: January 23, 2025, 10:51:26 am by PartialDischarge »
 

Online jpanhalt

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Re: Aliexpress jump wire
« Reply #3 on: January 23, 2025, 11:39:57 am »
Since you have 15 micron wire for comparison, I would look at both under a microscope.  Your visual comparison, though, makes it more convincing.
 

Offline 2N3055

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Re: Aliexpress jump wire
« Reply #4 on: January 23, 2025, 11:52:27 am »
Probably confusion as to diameter of the wire (metal) and complete with insulation....
"Just hard work is not enough - it must be applied sensibly."
Dr. Richard W. Hamming
 

Offline PartialDischargeTopic starter

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Re: Aliexpress jump wire
« Reply #5 on: January 23, 2025, 11:56:07 am »
Probably confusion as to diameter of the wire (metal) and complete with insulation....
Absolutely not.
 

Offline 2N3055

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Re: Aliexpress jump wire
« Reply #6 on: January 23, 2025, 12:01:22 pm »
Probably confusion as to diameter of the wire (metal) and complete with insulation....
Absolutely not.

Absolutely not what?

Are you saying you are absolutely sure you are not confused, or that manufacturer did not label it for metal diameter and provided thick insulation?
I see obvious typo on that label, so not much attention to factual details on their part...
"Just hard work is not enough - it must be applied sensibly."
Dr. Richard W. Hamming
 

Offline PartialDischargeTopic starter

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Re: Aliexpress jump wire
« Reply #7 on: January 23, 2025, 12:20:07 pm »


Absolutely not what?

Are you saying you are absolutely sure you are not confused, or that manufacturer did not label it for metal diameter and provided thick insulation?
I see obvious typo on that label, so not much attention to factual details on their part...

The measured diameter by me is correct and there is no plastic or varnish insulation in the cable. Also I tested the current carrying capability of a few cms of it and it is higher that what I get with a real 15um Heraeus bonding wire.  I highly suspect it is not making direct electrical contact because it is an Aluminum cable and the shininess in it points in that direction. Thus it probably has 0% silver in it making it the second lie in this products. I could test it chemically but I don't have the time.
I posted this information as there is no other information on the web about them
 
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Online jpanhalt

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Re: Aliexpress jump wire
« Reply #8 on: January 23, 2025, 02:05:47 pm »
If you have some HCl (muriatic acid), silver is quite resistant to dissolution while aluminum isn't.
 

Offline macboy

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Re: Aliexpress jump wire
« Reply #9 on: January 23, 2025, 06:50:38 pm »
When purchasing from "Ali" as you did, keep in mind that "silver", "gold" etc. should be assumed to be adjectives, not nouns. They refer to the color of the product, not what it is made of. So one should assume that "Silver wire" is just wire that is silver in appearance.

I fully trust you that it is thicker than advertised, since the production cost is probably higher for thinner wire that must be very carefully drawn out more times to make it super thin. The material cost is practically nothing in either case.  This is the exact opposite of thick wire, where you would be more likely to get something thinner than promised due to high material cost.

The second and third issues:
Quote
-does not make electrical contact with DMM probes
 -hard to solder, takes a few seconds, after which it makes electrical contact at the solder joints

...is entirely consistent with wire that is insulated with some type of varnish. This is normal and expected for board "bodge" wire so that it doesn't short out anything between connections, and you can cross several wires without issue. The varnish is designed to be soldered-through (not mechanically removed), and is very thin and practically invisible. With correct iron temperature and a decent flux, it is usually easy enough. If the varnish isn't exposed to fresh hot flux as it is heated, you might have a hard time. This varnish would not likely explain the high diameter, as it is very thin.
 
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Online thm_w

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Re: Aliexpress jump wire
« Reply #10 on: January 23, 2025, 10:38:50 pm »
Out of curiosity, what were you going to use 7 and 9um wire for? Did you want uninsulated specifically?
What seller did you buy from?

In the listing it looks like they offer 9, 10, and 20um. Not sure what the point of having 9 and 10 is.. must be something else different. Lots of purchases but few reviews.
In the photos 20um is copper colored.

https://www.aliexpress.com/item/1005008144700954.html
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Online wraper

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Re: Aliexpress jump wire
« Reply #11 on: January 23, 2025, 10:45:17 pm »
Quote
-does not make electrical contact with DMM probes
Quote
The measured diameter by me is correct and there is no plastic or varnish insulation in the cable.
These two statements do not add up. Also those wires are supposed to be insulated.
Quote
main problem is that is does not solder easily either
Because they are insulated. They are supposed to run over the PCB and not short something.
« Last Edit: January 23, 2025, 10:47:20 pm by wraper »
 

Online thm_w

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Re: Aliexpress jump wire
« Reply #12 on: January 23, 2025, 11:00:58 pm »
Because they are insulated. They are supposed to run over the PCB and not short something.

The really thin stuff is not supposed to be insulated. Its to repair short sections of broken tracks, so its easier if there is no insulation.
I'm sure they make both types though.

https://www.aliexpress.com/item/1005003008223364.html "Ease of Use:No need to scrape paint; the wire can be directly welded for a hassle-free soldering experience."

https://www.aliexpress.com/i/4000405850908.html https://ae-pic-a1.aliexpress-media.com/kf/Abd8d35f502844f688184f3268d573f59x.jpeg_.webp
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Online wraper

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Re: Aliexpress jump wire
« Reply #13 on: January 23, 2025, 11:08:22 pm »
Because they are insulated. They are supposed to run over the PCB and not short something.

The really thin stuff is not supposed to be insulated. Its to repair short sections of broken tracks, so its easier if there is no insulation.
I'm sure they make both types though.

https://www.aliexpress.com/item/1005003008223364.html "Ease of Use:No need to scrape paint; the wire can be directly welded for a hassle-free soldering experience."

https://www.aliexpress.com/i/4000405850908.html https://ae-pic-a1.aliexpress-media.com/kf/Abd8d35f502844f688184f3268d573f59x.jpeg_.webp
"No need to scrape paint; the wire can be directly welded for a hassle-free soldering experience" does not mean it's not insulated.
EDIT: also scraping insulation from a wire this thin is nearly impossible, it will simply break.
« Last Edit: January 23, 2025, 11:16:53 pm by wraper »
 
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Online thm_w

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Re: Aliexpress jump wire
« Reply #14 on: January 23, 2025, 11:39:53 pm »
"No need to scrape paint; the wire can be directly welded for a hassle-free soldering experience" does not mean it's not insulated.
EDIT: also scraping insulation from a wire this thin is nearly impossible, it will simply break.

True, could have some kind of very thin low temp insulation.
They definitely make uninsulated copper and silver bond wire in these diameters, though I'm not sure of the cost.

edit: here is one that specifically says "no insulation" or "insulation", though we still don't know what OPs should be
https://www.aliexpress.com/item/1005006607774111.html
« Last Edit: January 23, 2025, 11:44:45 pm by thm_w »
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