Sparkfun – Cherry MX2A Key Switch – Red

Resources:Datasheet
Linear Cherry MX2A Red Mechanical Key Switch with 2.0 mm Actuation and 100 Million Actuation Life
The SparkFun Cherry MX2A Red is a linear mechanical key switch designed for custom keyboards, replacement keyboard assemblies, and embedded human-machine interfaces. It provides a smooth, uninterrupted keypress without a tactile bump or audible click, making it well-suited for gaming, rapid repeated keystrokes, and applications requiring consistent key movement. The switch has a 2.0 mm actuation point and 4.0 mm total travel while maintaining compatibility with standard Cherry MX keycaps and PCBs.
The MX2A generation incorporates factory-applied lubrication, an optimised precision coil spring and refined housing geometry to improve key travel and reduce spring noise. Gold crosspoint contacts provide corrosion resistance and reliable electrical switching, while the housing uses a polymer and glass-fibre construction to support the internal mechanism and keyboard mounting. A built-in recess accommodates a standard 3 mm LED for optional key illumination, and the switch is rated for more than 100 million actuations for long-term keyboard and control-interface use.
Key Features

Linear Switching Action: Provides smooth key movement without a tactile bump or audible click.
2.0 mm Actuation Point: Activates after 2.0 mm of key travel for responsive input.
4.0 mm Total Travel: Provides full key movement of 4.0 mm from the rest position to bottom-out.
Factory Lubrication: Pre-applied lubrication supports smoother movement and reduced operating noise.
Precision Coil Spring: Optimised spring construction provides consistent pressure resistance throughout repeated operation.
Linear Switching Stem: Straight switching surface delivers direct triggering and the characteristic MX Red linear feel.
Precision Upper Housing: CAD-engineered housing provides accurate guidance for the switching stem.
Gold Crosspoint Contacts: Self-cleaning gold-plated contacts provide corrosion resistance and reliable electrical switching.
Long Operating Life: Rated for more than 100 million actuations for repeated-use applications.
Mounting Compatibility: Suitable for plate-mount and PCB-mount keyboard designs.
Standard Keycap Support: Compatible with standard Cherry MX keycaps.
LED Support: Built-in housing recess accommodates a standard 3 mm LED for optional illumination.
Reinforced Housing Base: Polymer and glass-fibre construction supports the internal switching mechanism and external mounting.

Applications

Custom mechanical keyboards
Replacement keyboard switches
Gaming keyboards
Embedded human-machine interfaces
Macro keypads
Control panels
Programmable input devices
DIY keyboard projects
Prototype user interfaces
Industrial operator interfaces
Mechanical button assemblies