OBSF-30
ActiveOBSF-30 Snap-in Arcade Button (30mm)
The industry-standard 30mm snap-in arcade push button from Sanwa Denshi. Used in virtually all Japanese arcade cabinets and tournament-grade fightsticks. Features a built-in microswitch with extremely light actuation for rapid-fire inputs.
Common Applications
The OBSF-30 is the default button in Vewlix and Blast City cabinets, Qanba and Hori fightsticks, and most custom arcade builds. Available in a wide range of colors. Snaps into a 30mm panel hole with no tools required.
Counterfeit Warning Medium risk
Fake Sanwa buttons exist on AliExpress and Amazon marketplace sellers. Genuine Sanwa has SANWA logo clearly molded inside the button rim, consistent spring feel, and smooth microswitch action. Fakes often have scratchy feel, inconsistent actuation, and blurry or missing logos. Buy from Focus Attack, Arcade Shock, or authorized dealers.
Compatibility
Standard 30mm snap-in mount. Compatible with all 30mm panel cutouts. Microswitch can be replaced with Omron, Cherry, or Honeywell microswitches for different feel.
Specifications
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Actuation Force
The force needed to press the button. Lower = more sensitive. Sanwa ~65g (light), Seimitsu ~85g (medium), Happ ~130g (heavy).
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65g
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Color
Button/actuator color. Green = start/go, Red = stop/emergency, Yellow = caution, Blue = reset (per IEC 60204-1).
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Various (White, Black, Red, Blue, Yellow, Green, etc.)
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Contact Configuration
Normally Open — circuit is off until you press. Standard for start/go/enable functions.
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NO (normally open)
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Diameter
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30mm
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Material
The bezel/body material. Metal bezels are more durable in harsh environments. Plastic is lighter and cheaper.
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ABS plastic
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Mechanical Life
How many press cycles before mechanical failure. Higher is better — 10M cycles at 100 presses/day = 274 years.
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5,000,000 cycles
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Microswitch Type
The internal switch mechanism. Built-in = sealed unit. Cherry D44X = replaceable, clicky. Omron = quieter, longer life.
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built-in
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Mounting Type
How the button attaches to the panel. Panel mount is standard — installs through a cutout from the front.
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snap-in
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Max Operating Temp
Highest temperature the button is rated to operate in.
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40°C
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Min Operating Temp
Lowest temperature the button is rated to operate in.
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0°C
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Panel thickness
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1-5mm
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Travel Distance
How far the button moves when pressed. Shorter = faster response. Sanwa 0.85mm is extremely short for competitive gaming.
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0.85mm
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Specs with this icon are linked to the manufacturer's original source page
Compatible Alternatives
These products are functionally equivalent cross-references from other manufacturers.
Installation Quick Reference
Mounting: Snap-in buttons push into a 30mm hole from the top of the panel. Screw-in buttons thread from below and secure with a nut. Use 2-3mm acrylic, wood, or metal panel.
Wiring: Connect the microswitch terminals to your encoder or PCB. Common ground shared across all buttons. Quick-disconnect (0.110") terminals are standard on Japanese buttons.
Dimensions
Wiring Diagram
Troubleshooting
Not responding to input
Check wiring continuity with a multimeter. Verify the contact block is properly seated. Inspect terminals for loose connections.
Where to Buy
Quick Specs
- Actuation Force
- 65g
- Color
- Various (White, Black, Red, Blue, Yellow, Green, etc.)
- Contact Configuration
- NO (normally open)
- Diameter
- 30mm
- Material
- ABS plastic
What People Are Saying
“Sanwa OBSF-30 for speed and sensitivity. The 0.85mm travel is insane — you barely touch them and they activate. Seimitsu if you want a bit more resistance so you dont accidentally press during neutral.”
Learn More
Data Sources
Specifications and product data sourced from the following references.
