I have a Dangerous Music Source. One of the momentary push buttons started to fail (I have to push it so hard to work that I'm afraid of breaking something else... I tried to re-solder it, but it seems to be an internal issue).

These buttons have an integrated LED (green in the case of my broken one). They have 4 pins to the circuit board, 2 rear ones for the contact, and 2 front ones for the led.

The space between the 2 front pins (LED) is 6mm.

The space between the 2 rear pins (contact) is 4.4mm.

The space between the row of 2 front pins and 2 rear pins is 5mm.

The width of the dark-gray plastic casing of the button is 7.5mm.

I am attaching 3 photos (downscaled to 1024 pixels wide) that show the button in details (I have removed the button cover and placed it on the board nearby).

photo 1 of switches

photo 2 of switches

photo 3 of switches

Due to the Stack Exchange 2MB limit on image file size, the full resolution images are on my website here: https://florianbador.com/pub/dangerous-music-source-broken-switch/

What are these switches? Where can I find them?

  • 2
    \$\begingroup\$ What on earth is a dangerous music source? \$\endgroup\$
    – Hearth
    Apr 8, 2021 at 22:15
  • \$\begingroup\$ A manufacture would really help, are there any identifying marks? If not, Digikey has a parametric search, good luck: digikey.com/en/products/filter/pushbutton-switches/199 \$\endgroup\$
    – Mattman944
    Apr 8, 2021 at 23:03
  • \$\begingroup\$ It's just right-angle, through-hole mount tactile switches with integrated LED + a plastic cap. You don't actually need the LED though, it's just fluff. And you can toss on any switch there, the footprint should be somewhat standardized. \$\endgroup\$
    – Lundin
    Apr 9, 2021 at 6:40

1 Answer 1


I did an image search for "illuminated tactile switch"

It looks like the SPJ series by Shanpu:


More precisely the SPJP3******** based on the documentation.

  • \$\begingroup\$ Thank you so much :) Everything corresponds, including the polarity of the LED, except the number of cycles... I did not press it 1M times ;) I cannot see the voltage of the LED in the documentation, but I assume it must be the right one (I measured 1.926v) \$\endgroup\$
    – FlorianB
    Apr 9, 2021 at 4:11
  • \$\begingroup\$ Voltage isn't a spec for LEDs as it varies too much across the lot. Manufacturers specify the current and the circuit has to supply that one at maximum. \$\endgroup\$
    – Janka
    Apr 9, 2021 at 6:06
  • \$\begingroup\$ @FlorianB Be sceptical when they only list mechanical life or only electrical life. Usually means that the one not listed is subpar. \$\endgroup\$
    – Lundin
    Apr 9, 2021 at 6:44
  • \$\begingroup\$ Any alternative to ShanPu? They sent me an absurd quote that has $50 of FedEx (for a few grams) and 10% of Paypal fees (supposed to be 2.9%). I can afford the $100 total they requested but not getting ripped off is a matter of principles... \$\endgroup\$
    – FlorianB
    Apr 12, 2021 at 13:55
  • \$\begingroup\$ I couldn't find any retailers, perhaps contact "dangerous" and ask them to supply the repair part? \$\endgroup\$
    – Jasen
    Apr 12, 2021 at 20:39

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