BSUN Usagi/537 Linear Switch

The BSUN Usagi/537 Linear Switch is a newly released mechanical switch designed for keyboard enthusiasts. Priced at $0.35 each, it features a linear switch type with a smooth typing feel and minimal stem wobble. The switch is designed by Xida and manufactured by BSUN, utilizing a Y3 stem material and a top housing made of PC, while the bottom housing is a modified PA66 with fiberglass for enhanced durability. Key specifications include an operating force of 45±5g, a bottom-out force of 51g±5g, a pre-travel distance of 1.9mm±0.2mm, and a total travel distance of 3.6±0.2mm. It comes with a 20mm KOS single-stage extended spring and is factory lubed to ensure smooth operation with a clacky or poppy sound profile. BSUN has made significant improvements in molding design and material modifications, addressing previous issues such as stem wobble and sound quality. Overall, the Usagi/537 aims to provide a satisfying typing experience with improved quality and performance.