ATS135BSM-1 from CTS-Frequency Controls is a crystal component used where stable timing and frequency reference functions are important in embedded electronics, communications hardware, industrial controls, and other clock-dependent circuit designs. As part of the crystals category, it is typically considered by engineers who need a dependable frequency control element for oscillators, timing networks, or signal synchronization paths. This part is relevant for both new design evaluation and ongoing maintenance of existing assemblies, especially when consistency in sourcing and documentation matters. The current lifecycle status is information not available, so teams should verify whether the device remains in active production before committing it to long-term programs. RoHS compliance information is also not available from the provided data, and engineers should confirm material compliance directly through the official datasheet, manufacturer documentation, or authorized channel support before use in regulated markets or export-sensitive applications.