MX2A-B1NA
ActiveCherry MX2A Brown Tactile (2024 Redesign)
Cherry MX2A Brown — 2024 redesign with smoother tactile bump.
Common Applications
Cherry completely redesigned the Brown in 2024. The MX2A has a larger, more defined tactile bump and smoother travel than the original. Cherrys response to years of criticism that Cherry Browns are scratchy compared to Gateron. Still 45g actuation, still MX-compatible, but noticeably improved 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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45cN (45g)
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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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Brown stem
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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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100,000,000 cycles
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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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2mm actuation, 4mm total
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Installation Quick Reference
Panel cutout: 22mm. Insert from the front of the panel, secure with mounting nut from behind (tighten to 2-3 Nm).
Contact block: Snap or screw the contact block onto the rear of the button body. Ensure the contact block orientation matches the wiring diagram — NO terminals are usually marked.
Wiring: Use 0.5-2.5mm² stranded wire with ferrules. Tighten screw terminals to 0.8 Nm. Test the button function before energizing the circuit.
Dimensions
Troubleshooting
Button doesn't respond when pressed
Check the contact block first — it's the most common failure point. Test continuity across the NO or NC terminals with a multimeter. If no click is felt, the return spring in the head may be broken.
Works intermittently
Contact block contacts are pitted or burned. Replace the contact block — don't try to file the contacts. Check if the rated cycle count has been exceeded.
Button feels mushy or doesn't click
The spring return mechanism in the button head is worn. Replace the head. The contact block can usually be reused if it tests OK.
Where to Buy
Price range
$27.86 — $33.51
across 2 distributors
Quick Specs
- Actuation Force
- 45cN (45g)
- Color
- Brown stem
- Mechanical Life
- 100,000,000 cycles
- Travel Distance
- 2mm actuation, 4mm total
What People Are Saying
“Cherry completely redesigned the Brown in 2024. The MX2A has a larger, more defined tactile bump and smoother travel than the original. Cherrys response to years of criticism that Cherry Browns are sc”