Discover the 12mm metal push button switch series (12D/12A/12G). Featuring IP67 waterproof, 7.5A current rating, SUS304/brass/aluminum housing, and LED illumination options. Ideal for compact industrial controls.
1. Introduction: Big Performance in a Small Package
When panel space is limited but reliability cannot be compromised, the 12mm Metal Push Button Switch Series delivers. Available in three variants – 12D, 12A, and 12G – this family of switches offers flexible current ratings, multiple housing materials, and LED illumination options to meet diverse application requirements.
Designed for 12–12.2mm panel mounting holes, these switches bring industrial-grade performance to compact control panels, automotive interiors, medical devices, and outdoor equipment.
2. Series Overview: 12D vs 12A vs 12G
| Parameter | 12D Series | 12A Series | 12G Series |
|---|---|---|---|
| Mounting Hole | 12 – 12.2mm | 12 – 12.2mm | 12 – 12.2mm |
| Switching Voltage | 1.5V – 250V AC/DC | 1.5V – 250V AC/DC | 1.5V – 250V AC/DC |
| Resistive Load (DC-13) | 12V/24V 3.5A | 12V/24V 1.5A | 12V/24V 1.5A |
| Resistive Load (AC-15) | 110V/250V 7.5A | 110V/250V 3A | 110V/250V 3A |
| Inductive Load (AC-15) | 110V/250V 1A | 110V/250V 0.5A | 110V/250V 0.5A |
| Inductive Load (DC-13) | 110V 1A | 110V 0.5A | 110V 0.5A |
| Rated Heating Current (Ith) | 7.5A / 250V AC | – | – |
| Pin Style | 2.8mm solder pins | 2.0mm solder pins | 2.0mm solder pins |
| Best For | High-power applications | Standard industrial control | LED color customization |
Key Takeaway: Choose 12D for higher current (up to 7.5A AC / 3.5A DC). Choose 12A or 12G for standard 3A AC / 1.5A DC applications. The 12G series adds flexible dual-color LED mixing capability.
3. Key Technical Parameters (Common to All Series)
| Parameter | Value |
|---|---|
| Working Temperature | -30°C ~ +85°C |
| Waterproof Rating | IP67 (at button end) |
| Operating Mode | Self-locking or Self-resetting (optional) |
| Switch Combination | 1NO (normally open) |
| Mechanical Life | 1,000,000 cycles |
| Electrical Life | >100,000 cycles (rated load) |
| Contact Resistance | <50 mΩ |
| Operating Force | Approximately 2.5 – 4N |
| Button Travel | 3mm (key stroke) / 1mm (contact stroke) |
| Base Material | Modified nylon PA66 |
| Contact Material | Silver tin oxide alloy |
| Dielectric Strength | >100MΩ @ 500VDC |
| Withstand Voltage | 1500V AC / 20mA / 1 min (pins to housing) |
4. Why Choose the 12mm Metal Push Button Switch?
🔵 IP67 Waterproof Protection
The button end is rated IP67, meaning it is completely dust-tight and can withstand temporary immersion in water (up to 1 meter for 30 minutes). Perfect for outdoor kiosks, marine equipment, and food processing applications.
🟢 High Current Capability
The 12D series supports up to 7.5A at 250V AC (resistive load) and 3.5A at 24V DC – impressive for a 12mm form factor. This allows direct control of small motors, heaters, and lighting circuits without external relays.
🟡 Multiple Housing Material Options
| Material | Benefits |
|---|---|
| SUS304 Stainless Steel | Corrosion-resistant, industrial-grade durability |
| Brass Nickel-Plated | Cost-effective, good conductivity, attractive finish |
| Aluminum Alloy Anodized | Lightweight, scratch-resistant, modern appearance |
🔴 LED Illumination Available
The 12mm series supports LED illumination with flexible options:
| Parameter | Options |
|---|---|
| LED Voltage | AC/DC: 3.3V, 6V, 9V, 12V, 24V, 36V, 48V, 110V, 220V |
| LED Current | 2mA – 20mA |
| Colors (Single) | Red, Green, Blue, Yellow, White |
| 12G Series Special | Freely combinable two-color mixing |
| LED Schematic | Single color (non-polarity) / Two-color (common anode or polarity switching) |
📊 Long Electrical Life
Tested for >100,000 electrical cycles at rated load (12D: DC-13 12V/24V 3.5A or AC-15 110V/220V 3.5A). The silver tin oxide alloy contacts ensure low and stable contact resistance throughout the switch’s life.
5. Material Quality: Built to Last
| Component | Material | Property |
|---|---|---|
| Housing | SUS304 / Brass Nickel-Plated / Aluminum Alloy | Corrosion resistance, durability |
| Button | PC + SUS316 | Impact resistance, stainless steel contact surface |
| Base | Modified Nylon PA66 | Heat resistance, flame retardant, high insulation |
| Contacts | Silver Tin Oxide Alloy | Low resistance, anti-welding, long life |
6. Installation and Wiring
Mounting: Standard 12mm panel cutout (12 – 12.2mm diameter)
Terminals:
12D series: 2.8mm solder pins
12A/12G series: 2.0mm solder pins
Wiring Tips:
Suitable for PCB mounting or hand soldering
For high-current applications (12D series), use appropriate wire gauge (minimum 22 AWG recommended)
Ensure proper strain relief for moving panels
7. Typical Applications
The 12mm metal push button switch series is ideal for:
Industrial control panels – Compact machinery, test equipment
Medical devices – Small footprint, easy to sanitize (stainless steel option)
Automotive interiors – Dashboard controls, aftermarket switches
Outdoor kiosks – IP67 waterproof for ticket machines, EV chargers
Marine equipment – Corrosion-resistant stainless steel option
Consumer electronics – High-end audio, gaming peripherals
Security systems – Access control panels
8. 12G Series Special Feature: Flexible Dual-Color LED
The 12G series stands out with its ability to freely combine two colors in a single switch. This is ideal for:
Status indication – Green =正常运行 / Red = fault
Mode selection – Blue = standby / White = active
Voltage presence – Visual confirmation without external indicators
Available LED wiring schematics:
Single color (non-polarity)
Two-color (polarity switching – different colors by reversing +/-)
Two-color (common anode – independent color control)
9. Compliance and Quality
Waterproof: IP67 (button end)
Contact Material: Silver tin oxide alloy – RoHS compliant
Housing Materials: Meet industrial durability standards
Testing: 100% electrical and mechanical testing before shipment
10. Why Source From Us?
Factory direct – Competitive pricing, no middlemen
Three series in one – Choose 12D, 12A, or 12G based on your current and LED needs
Material options – Stainless steel, brass, or aluminum alloy
LED flexibility – Wide voltage range (3.3V to 220V) and color options
Quality assured – Every unit tested before shipment
OEM/ODM welcome – Custom markings, colors, and cable assemblies available
11. Conclusion
The 12mm Metal Push Button Switch Series (12D/12A/12G) offers a rare combination of compact size, industrial durability, and configuration flexibility. Whether you need high current handling (12D), standard control (12A), or dual-color LED mixing (12G), this family has a switch for your application.
📧 Contact us today for samples, technical drawings, or a bulk quotation.
