BSUN Usagi/537 Linear Switch

The BSUN Usagi/537 Linear Switch is a newly designed mechanical switch that emphasizes a smooth typing experience and improved performance. Priced at $0.35 each, these switches feature a linear design, crafted by designer Xida and manufactured by BSUN. Key specifications include a stem material made of Y3, a top housing of polycarbonate (PC), and a modified PA66 bottom housing with fiberglass. The switch operates with a force of 45±5g and has a bottom-out force of 51g±5g, with a pre-travel distance of 1.9mm and total travel of 3.6mm. It includes a 20mm KOS single-stage extended spring and comes factory-lubed for enhanced smoothness. Users can expect minimal stem wobble and a sound profile described as clacky or poppy, with no unwanted noises during use. BSUN has recently made significant improvements in their switch production, including advancements in molding design and the introduction of new lubing techniques. These enhancements address previous issues such as stem wobble and hollow sounds, resulting in a more solid and satisfying typing experience.