Transponder Coils Product Top Page Search by Part No. Search by Characteristics Cross Reference Catalog Tech Notes Technical Support Tools EoL/NRND Info. EPCOS Design Tools Design tools and simulation models for EPCOS brand components Sample Kits A short description of each sample kit and detailed information from PDF files. Sample kits are available to place an order through the distributor's web site. Failure in Time (FIT) After logging in to myTDK, you can check FIT information on individual product details pages.