Bsun X Linear Switches

The BSUN X is a linear mechanical keyboard switch designed for enthusiasts and custom keyboard builders seeking a smooth and consistent typing experience without tactile bumps or clicks. It suits users who prefer a quiet, fluid keystroke with moderate actuation force and value durable materials and precise factory lubrication for reduced friction and wear.

Feel & Sound

• Provides a smooth, linear keystroke without tactile feedback or audible clicks, suitable for quiet environments.
• Factory lubrication with PTFE film reduces scratchiness, contributing to a quieter and smoother sound profile.
• Bottom-out feel is moderate, balancing firmness and comfort for extended typing sessions.

Actuation Characteristics

• Operating force around 45 g offers a balance between light and firm keypresses, reducing finger fatigue.
• Pre-travel of approximately 1.6 mm allows for responsive actuation without accidental key presses.
• Total travel of about 3.5 mm is standard, providing familiar key depth for most users.

Build Quality

• Top and bottom housings made from polycarbonate (POK) material, known for low friction and high durability.
• Stem uses a modified LY material, which can enhance smoothness and reduce wear over time.
• Includes precise factory lubrication, which minimizes initial scratchiness and may reduce the need for immediate re-lubing.

Compatibility & Mounting

• 5-pin PCB mount with MX-compatible footprint, compatible with most standard mechanical keyboard PCBs.
• Unknown LED compatibility and hot-swap friendliness.

Trade-offs

• Linear design lacks tactile feedback, which may be less suitable for users who prefer a noticeable actuation point.
• Unknown long-term spring noise or stem wobble, which could affect typing feel after extended use.
• May require a break-in period despite factory lubrication to reach optimal smoothness.