Bsun Usagi/537 LINEAR Switches

The Bsun Usagi/537 LINEAR is a meticulously engineered mechanical keyboard switch designed for enthusiasts who demand precision and smoothness in their typing experience. With its advanced materials and innovative design, this switch offers a unique blend of performance and durability.

Material Composition

The 537 switches are crafted using a unique blend of materials that enhance their performance and longevity. The stem is made from the new Y3 material, identical to the Y3X, which is a UPE blend known for its fortified hardness and increased smoothness. The top housing is constructed from PC, while the bottom housing features modified PA66, likely reinforced with fiberglass, contributing to the switch's clacky and full sound profile.

Design and Manufacturing

These switches are manufactured using BSUN's latest stem and housing molds. This updated design results in significant improvements over older BSUN switches, including reduced stem wobble and better installation compatibility with a variety of plate materials. The precise bottom-out with minimal interference ensures a consistent and satisfying typing experience.

Switch Specifications

• Switch Type: Linear
• Manufacturer: BSUN
• Designer: Xida Studio
• Stem Material: New Y3
• Top Housing: PC
• Bottom Housing: Modified PA66
• Operating Force: 45g±5g
• Bottom-out Force: 51g±5g
• Pre-travel: 1.9mm
• Total Travel: 3.6mm
• Spring: 20mm single-stage nickel-plated spring

Factory Lubrication

The Bsun Usagi/537 LINEAR switches come pre-lubricated from the factory to ensure optimal performance right out of the box. A mix of 205 and 105 lubricants is applied to the sliders, while a dry film lube is used on both the sliders of the stem and the spring. This meticulous lubrication process contributes to the switch's smooth operation and enhances its overall feel.

Performance and Compatibility

Designed for a seamless typing experience, these switches offer an operating force of 45g±5g and a bottom-out force of 51g±5g, providing a balanced tactile feedback. The pre-travel distance is 1.9mm, with a total travel of 3.6mm, making it ideal for fast and accurate typing. The improved installation compatibility ensures that these switches can be easily integrated into most keyboard builds, making them a versatile choice for custom keyboard enthusiasts.

Conclusion

The Bsun Usagi/537 LINEAR switches are a testament to the blend of innovative materials and precise engineering. Whether you're building a custom keyboard or upgrading your current setup, these switches offer a reliable and enjoyable typing experience, characterized by their smoothness, durability, and distinctive sound profile.