MX1A-A1NA
ActiveCherry MX Black Linear Heavy Switch
Cherry MX Black — the original heavy linear.
Common Applications
Heavier spring than Red (60cN vs 45cN). The original Cherry MX switch variant. Used in point-of-sale terminals, industrial keypads, and by typists who prefer resistance. Less popular for gaming due to heavier actuation.
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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60cN (60g)
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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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Black 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
$27.21 — $41.27
across 2 distributors
Quick Specs
- Actuation Force
- 60cN (60g)
- Color
- Black stem
- Mechanical Life
- 100,000,000 cycles
- Travel Distance
- 2mm actuation, 4mm total
What People Are Saying
“Heavier spring than Red (60cN vs 45cN). The original Cherry MX switch variant. Used in point-of-sale terminals, industrial keypads, and by typists who prefer resistance. Less popul”