Transponder Coils Product Top Page Catalog Search by Characteristics Search by Part Number Cross Reference Tech Notes Technical Support Tools EoL/NRND Info. Technical Support Tools TDK Electronics Design Tools Design tools and simulation models for TDK Electronics 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.