C&K provides a recommended PCB layout and land pattern in their application notes, which can be found on their website. The recommended land pattern is a rectangular pad with dimensions of 3.5mm x 2.5mm, with a 1.5mm diameter hole in the center for the switch's locating pin.
To ensure reliable switch operation in high-vibration or high-shock environments, it's recommended to use a switch with a higher operating force (e.g., 4N or 6N) and a shorter travel distance (e.g., 0.5mm). Additionally, using a switch with a built-in stabilizer or a switch with a larger actuator can help improve switch stability.
C&K recommends cleaning the switch with a soft, dry brush or a lint-free cloth to remove any debris or contaminants. Avoid using harsh chemicals, solvents, or abrasive materials that can damage the switch's contacts or housing. For more thorough cleaning, use a mild soap solution and dry the switch thoroughly to prevent moisture buildup.
The KSR223GNC is rated for indoor use, but it can be used in outdoor or harsh environmental applications with proper sealing and protection. C&K recommends using a switch with a higher IP rating (e.g., IP67 or IP69K) and applying a conformal coating or potting compound to protect the switch from moisture and environmental stressors.
The expected lifespan of the KSR223GNC is typically rated for 100,000 to 500,000 cycles, depending on the operating conditions and usage. To ensure overall system reliability, it's recommended to design in redundancy, use fault-tolerant circuitry, and implement regular maintenance and inspection schedules to detect and replace worn-out switches.
Findchips
Findchips