TDK Corporation has expanded its YFF series of 3-terminal filters for automotive applications to include higher voltages up to 35 V and higher capacitances up to 4.7 µF. Such components are used to suppress voltage variation and high-frequency noise, which can cause system malfunctions. Mass production of the product series began in June 2025.

With the miniaturization of automotive electronic systems, there is an increasing demand for measures to prevent system malfunctions. Usually, numerous capacitors are employed in such applications. On the other hand, the number of components must be reduced due to the miniaturization of these systems. To address these challenges, 3-terminal filters, characterized by a low ESL (equivalent series inductance), are gaining significant demand.

By optimizing the material selection and product design, the new products feature significantly higher withstand voltage, ranging now from 6.3 V to 35 V, and considerably higher capacitance, ranging now from 0.47 μF to 4.7 μF. The 35-V product with an insertion loss of 40 dB (4 MHz to 2 GHz) can be used for a broader range of power lines, including both input and output of power-supply systems, while the 4.7 μF product with an insertion loss of 30 dB (300 kHz to 3 GHz) is more effective as input capacitors than conventional products in reducing voltage fluctuation and countering high-frequency noise. Moreover, depending on set usage conditions, it is possible to halve the component count required to suppress voltage fluctuations to the same extent from the MLCC.

With advancements in automotive electronic systems aimed at enhancing safety, comfort, and infotainment capabilities, there is an increasing demand for measures to prevent system malfunctions.
To suppress voltage variation and high-frequency noise, which can cause such malfunctions, numerous capacitors are typically employed. However, the trend toward miniaturization of these systems raises concerns about mounting space limitations due to the increased number of components.
To address these challenges, 3-terminal feedthrough filters, characterized by low ESL, are gaining significant demand. Their high noise suppression effectiveness is expected to reduce the number of components and improve performance characteristics.

03 June 2025