Littelfuse Inc. extends its K5V Series of illuminated tactile switches with the release of new K5V4 models including the gull-wing and 2.1-mm pin-in-paste (PIP) versions compatible with reflow soldering. These switches target a range of applications, such as data centers, network infrastructure, industrial equipment, and pro audio/video systems.
The K5V4 is the first long-travel, single pole/double throw (SPDT) illuminated tactile switch in a reflow-capable SMT package, Littelfuse said, filling a critical gap in the market. They enable direct SMT assembly for the first time, reduce production costs, support higher throughput, and improve end-product quality, while maintaining durability and tactile performance, the company added.
The K5V4 switches are reflow soldering-compatible thanks to the use of a high-temperature polyarylate (PAR) material with a 250°C thermal deformation threshold, eliminating the need for silicone sleeves or special handling. They are suited for manufacturers transitioning from wave to reflow soldering processes.
Other features include SPDT contact configuration with normally-open and normally-closed options, a sharp tactile response with audible click and 4N operating force, and integrated high-brightness LEDs in a variety of colors and bi-color options.
For greater reliability, these switches provide a compact, dust-resistant design for reliable operation in dense boards, and gold-plated dome contacts for long-term contact performance. They are available in SMT (gull wing) and THT (PIP) versions for design flexibility.
The K5V tactile switches are currently available in tape and reel format, with quantities ranging from 1,000 to 2,000 units. Samples can be requested through authorized Littelfuse distributors.