VEXUNGA 12mm Momentary Waterproof Push Button (Green)
Overview
A generic 12mm panel-mount momentary pushbutton — the button connects a 2-wire circuit only while physically pressed (normally-open, spring-return). Domed metal/plastic bezel, waterproof-gasketed for panel mounting, sold pre-wired with a red/black pigtail. No LED, no latching mechanism. Ordinary DIY/project switch for panel controls, not a precision or spec’d industrial part — identical-looking listings are sold under many storefront brand names (VEXUNGA, STARELO, etc.) from the same generic factory tooling.
Key specs
- Operating voltage: n/a (passive mechanical switch, not powered) — rated for up to 250V AC across contacts
- Logic level: n/a — safe for any logic-level DC switching (button contacts are just a dry electrical connection; AC rating is a ceiling, not a floor)
- Current draw: n/a (passive switch)
- Contact rating: 1A @ 250V AC / 3A @ 125V AC (printed directly on the listing title — most authoritative figure available)
- Interfaces: 2-wire pigtail (red/black), SPST momentary, normally-open
- Mounting: 12mm round panel-mount hole, waterproof gasket
- Operating temperature: approx. -25°C to 85°C (seen on comparable VEXUNGA listings in this same product family — not confirmed on this specific green listing)
Pinout
| Wire | Function | Notes |
|---|---|---|
| Red | Contact 1 | No inherent polarity — it’s a dry switch contact, red/black is just the manufacturer’s wire coloring |
| Black | Contact 2 | Circuit closes between red and black only while button is pressed |
No LED wires on this variant — button cap color (green) is just the plastic/cap color, not an illuminated indicator.
Wiring / typical usage
Typical MCU usage: one wire to GPIO (configured with internal or external pull-up/pull-down), the other to GND (or 3.3V if using a pull-down). Momentary contacts bounce — debounce in firmware (simple delay-based debounce or a debounce library) rather than assuming a clean single transition per press. Rated contact current is far above logic-level GPIO needs, so no series resistor is required for direct GPIO sensing (only relevant if switching real AC/DC loads near the rated ceiling).
Code / libraries
- No library needed for basic use — read as a standard digital input with
INPUT_PULLUP(Arduino) or equivalent, invert logic since pressed = LOW when using a pull-up to ground. - For robust debouncing:
Bounce2(Arduino) or a simple millis()-based debounce.
Source material
- Product listing (green variant, as purchased — style
6Pcs Green, last purchased per Amazon order history Jan 6, 2026): screenshot only, exact ASIN for the green variant not captured - Comparable listings for the same product family (used to cross-check specs, different color variants of what appears to be the same physical part):
- Product photo:
/inventory/vexunga-12mm-momentary-pushbutton/product-photo.jpg— representative (Sunrom’s own green 12mm waterproof momentary pushbutton, same physical style/color, different reseller than the one purchased from), sourced 2026-07-25 from https://www.sunrom.com/media/product/2059.jpg - Local files: see
/inventory/vexunga-12mm-momentary-pushbutton/amazon-listing.jpeg(as-supplied screenshot of Alex’s own order history/product page)
Verification
Inferred from vendor listing only — no manufacturer datasheet exists for this class of generic part. Contact rating (1A@250V/3A@125V AC) and physical description (12mm, momentary, waterproof, 2-wire, no LED) are read directly from the product title/images in the supplied screenshot — high confidence on those. Operating temperature range is carried over from comparable same-brand listings in other colors, not confirmed specifically for the green variant — treat as approximate. No datasheet exists to verify against; this is as good as sourcing gets for this part class.
Notes / gotchas
- No LED/illumination — purely a mechanical switch. Don’t confuse with the very similar-looking illuminated 12mm panel switches (5-wire, LED + switch) sold in adjacent listings from the same stores.
- Waterproof rating is claimed by the listing/product family but no formal IP rating number was found tied to this specific listing — fine for splash/dust exposure on a project enclosure, don’t treat as a verified submersion rating.
- Being a generic switch-house part, physical dimensions (thread length, wire pigtail length, panel thickness range) weren’t captured — measure the physical part before finalizing an enclosure cutout.