BSUN Usagi/537 Linear Switch

The BSUN Usagi/537 Linear Switch is a newly released mechanical keyboard switch designed for smooth typing experiences. Priced at $0.35 each, these linear switches feature a stem made from Y3 material and a bottom housing crafted from modified PA66 with fiberglass. The switches have an operating force of 45±5g and a bottom-out force of 51g±5g, with a pre-travel distance of 1.9mm and a total travel distance of 3.6mm. They are equipped with a 20mm KOS single-stage extended spring and come factory-lubed for enhanced performance. The Usagi switches are designed to minimize stem wobble and provide a clacky or poppy sound profile, resulting in a smooth typing feel. BSUN has made significant improvements in their manufacturing process, including enhanced molding designs and new factory lubrication techniques to address previous issues with their switches. These advancements aim to deliver a more satisfying and solid typing experience, making the Usagi/537 a noteworthy option for keyboard enthusiasts.