CSTCR CERALOCK® Resonators Murata CSTCR CERALOCK® Resonators are SMD resonators used for general consumer applications, full-speed USB, and automotive functions. These resonators offer a built-in load capacitor that eliminates the need for an external load capacitor. The CSTCR resonators come in a small package with a low profile and provide high-density mounting. These resonators feature a wide temperature range. Murata CSTCR CERALOCK resonators are available with standard frequency tolerance for both automotive and consumer/industrial applications.