#848 DPDT Momentary Push-buttons

All about double-pole, double-throw (DPDT) non-latching/momentary push-button switches.

Here’s a quick demo..

Notes

While designing LEAP#847 2d6 Dice Roller I considered one option that required a momentary dual pole push-button. I didn’t have any in my parts store, and it turns out that this particular switch configuration is quite rare, especially for low voltage applications.

I did find one part in a reasonable small form factor: “5PCS 10PCS PS-202 Mini 6MM 6Pin SPDT DPDT Momentary Push Button Switch 2A 250VAC 5A 120VAC Toggle Switch With Red Cap” (aliexpress seller). I purchased 5 pieces for SG$4.88 (Jun-2026).

This particular part has a mirrored layout of the two poles on either side of the switch. The switch itself has a nice positive “click” between states, but is non-latching off course.

I’ve attached some pin headers to make a breadboard-compatible switch:

Circuit Design

Designed with Fritzing: see MomentaryDPDT.fzz.

This is a simple demonstration of a non-latching (momentary) 4-way crossover switch.

Circuit setup on a breadboard:

When the button is not pressed, yellow LED is on.

When the button is pressed, current is reversed. The yellow LED turns off, and the red LED turns on.

Credits and References

• “5PCS 10PCS PS-202 Mini 6MM 6Pin SPDT DPDT Momentary Push Button Switch 2A 250VAC 5A 120VAC Toggle Switch With Red Cap” (aliexpress seller)
  • Purchased 5 pieces for SG$4.88 (Jun-2026)
• https://en.wikipedia.org/wiki/Switch