Footprint For Solderable Jumper?

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   Does anyone have experience generating good (or bad!) footprints for solderable jumpers?  I'm looking to configure a circuit board with something like this:

Or this:

I want something that is easy and quick to connect, but also easy to desolder and clean up for reconfiguration.  If it makes any difference, the intent is to use lead-free solder.

Has anyone done this, with good or bad results?  Can anyone provide pointers?  Better yet, dimensions / configuration or even an Altium footprint for a "known-good" solder jumper?

Thanks!

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LaserAlex Members Profile Send Private Message Find Members Posts Add to Buddy List Active User Joined: 06 Jun 2012 Location: Seattle, WA Status: Offline Points: 27	Post Options Post Reply Quote LaserAlex Report Post Thanks(0) Quote Reply Topic: Footprint For Solderable Jumper? Posted: 13 Feb 2017 at 2:55pm
	Does anyone have experience generating good (or bad!) footprints for solderable jumpers? I'm looking to configure a circuit board with something like this: Or this: I want something that is easy and quick to connect, but also easy to desolder and clean up for reconfiguration. If it makes any difference, the intent is to use lead-free solder. Has anyone done this, with good or bad results? Can anyone provide pointers? Better yet, dimensions / configuration or even an Altium footprint for a "known-good" solder jumper? Thanks!



Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5718	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply Posted: 13 Feb 2017 at 3:42pm
	Your picture is an OK example. There are just a couple rules - The Gap should be the same as your trace/space No solder Mask in the Gap The pad size should be able to carry whatever current you're using Here are some alternate solder jumpers that work well -
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LaserAlex Members Profile Send Private Message Find Members Posts Add to Buddy List Active User Joined: 06 Jun 2012 Location: Seattle, WA Status: Offline Points: 27	Post Options Post Reply Quote LaserAlex Report Post Thanks(0) Quote Reply Posted: 13 Feb 2017 at 8:16pm
	Thank you for the quick response, Tom! The options with the interdigitated contacts look like they would be very easy to short reliably, but I'm worried about the difficult of cleaning them up if the configuration needed to change. I'm sure solder wick and flux could clean them out, but I really want something easy to work with. Have you personally soldered and desoldered all of these? If you were tasked with reconfiguring a thousand of these jumpers, which would you prefer had been used on the board? Thanks! -Alex

Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5718	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply Posted: 13 Feb 2017 at 8:51pm
	I'm an IPC CIT trainer for soldering and J-STD-001 solder joint acceptability and these patterns clean up really nice. Place a solder wick on the solder and apply the iron and the solder wick sucks up the solder and with a wire mesh touchup it should be clean to go. Old fashion pad with hole and wire is still a popular Jumper solution. Even a wire loop across 2 SMD pads with easy access to cut. No need to use a solder iron.
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LaserAlex Members Profile Send Private Message Find Members Posts Add to Buddy List Active User Joined: 06 Jun 2012 Location: Seattle, WA Status: Offline Points: 27	Post Options Post Reply Quote LaserAlex Report Post Thanks(0) Quote Reply Posted: 13 Feb 2017 at 8:54pm
	Thanks, Tom. Great info!

MSM_KOPF Members Profile Send Private Message Find Members Posts Add to Buddy List Advanced User Joined: 02 Feb 2015 Status: Offline Points: 53	Post Options Post Reply Quote MSM_KOPF Report Post Thanks(0) Quote Reply Posted: 22 Feb 2019 at 5:34am
	How should such a footprint be named ? In my current footprint there are 2 pads each 0.5 x 1.0mm with a gap of 0.2mm between the 2 long sides. (02.mm Gap due to clearance requirements) There are versions of this footprint. 1. without any solder paste for an open solderable jumper 2. with solder paste over both pads and the gap between the pads for a close jumper after reflow A resistor would be something like "RESC1608X70" Is there any naming convention or recommendations for both footprints?

Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5718	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply Posted: 22 Feb 2019 at 8:46am
	If it's a Jumper I would use: JUMP0510WP = Jumper 0.5 X 1.0 With Paste JUMP0510WOP = Jumper 0.5 X 1.0 With Out Paste You get the idea.
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DrewRu Members Profile Send Private Message Find Members Posts Add to Buddy List New User Joined: 04 Oct 2019 Status: Offline Points: 1	Post Options Post Reply Quote DrewRu Report Post Thanks(0) Quote Reply Posted: 04 Oct 2019 at 7:22am
	Hi, It is still common to represent this as an optional 0 Ohm resistor and many designs still use a 0-Ohm SMD link; you just have to remember to use the right footprint for the artwork if you want to use a solder bridge.