The efficiency of power modules is typically highest when operating close to their limits, resulting in higher operating temperatures. A precise and accurate temperature control is essential to operate at these limits and to prevent the semiconductors in the power modules from overheating. To address the temperature accuracy challenge, TDK presents two 100 percent lead-free and RoHS-compatible solutions that describe the corresponding R/T characteristic curves of existing non fully RoHS-compatible technologies available on the market, enabling a seamless substitution.