TDK Launches High-Voltage 3-Terminal Filters for Automotive EMC

TDK Corporation has expanded its YFF series of 3-terminal filters, offering new variants rated for up to 35 V and 4.7 µF. Designed for automotive power lines, these components help reduce voltage fluctuations and suppress high-frequency noise, improving electronic system stability in next-gen commercial vehicles.

Miniaturization of vehicle electronics demands smaller, high-performance components. These filters address that need by combining low equivalent series inductance (ESL) with high insertion loss:

• 0.22 µF / 35 V variant offers 40 dB loss from 4 MHz to 2 GHz
• 4.7 µF / 10 V variant provides 30 dB from 0.3 MHz to 3 GHz

This performance enables smoothing, filtering, and decoupling on both input and output power lines. Crucially, the design can cut the component count by half compared to traditional MLCCs, supporting compact module design in electric and connected buses.

Qualified to AEC-Q200 standards, these filters ensure automotive-grade reliability, and their compatibility with high-power conditions makes them suitable for battery systems, control units, and DC-DC converters.