Where to buy very small tactile switches

Projects General Guidance
1

I am having a really hard time finding tactile switches of the small variety. One switch on my radio headunit died. and I would like to replace it. (it failed closed rendering the head unit useless until I removed it).

It measures about 2mmx3mm and has a stem height of about 2mm. It is surface mount.

All my searches on mouser and digikey have not netted me any good results, surprisingly.

Couldn't think of a better place to ask than this.

Attached is a pic. The leads shortest distance from each other are connected. The leads opposite the long distance are normally open.

Any ideas on what to replace it with would be great. I might just hang some wires out and butcher the head unit lol.

Most I have seen are 6x6mm which is way too large.

switch.jpg
switch.jpg980×1306 229 KB

2

Did you search for "tact switch" on ebay.
It might be listed as 3x4x2mm
Leo..

3

How about this one:-
Small switch

Or failing this here is the search
surface mount switches

4

Maybe you need to re-try your searching; start with a different filter, and work toward the size.

This one - for instance - is really close (not exact, though):

Here's something from Mouser (not sure on outline size, though - but it looks close):

Just play with the filters - and you might come up with something "close enough" if you have room for a .25 mm margin on either side.

5

I realize that the sony headunit may have some propriety switches... I have come across all the suggestions that you all have posted. This indicates that I have exhausted all (or at least the majority) of options.

This one does seem promising. And I have been considering it. perhaps it will be even easier than a 4 lead switch.

I guess I will solder wire leads to verify switch functionality and verify that the switch operates as I have drawn in the picture diagram and tested.

I can probably use solder/spare wire to lift the switch high enough.

The input is appreciated as always! I hope this switch is more resilient than sony's!

6

Fronts of head units usually have a zillion switches.
There must be another one on there that you never use.
Leo..

7

Yes there is. But they are damn hard to remove. And it appears that the solder contacts are actually under the switch, making it very hard to solder. I did think of that, but the process of removing the bad one has convinced me to not remove a switch unless I never plan to reuse it...

Good thought though :wink:

8

Time to invest in a rework station (hot air).
Leo..