TDK Corporation has announced the MAF0603GWY series of noise suppression filters. The filters measure 0.6 mm x 0.3 mm x 0.3 mm (L x W x H). They are intended for use in small consumer devices such as smartphones and wearables. Mass production is set to begin in April 2026.
Electromagnetic noise from audio lines in smartphones and wearable devices can interfere with built-in antennas and reduce receiver sensitivity. Conventional chip beads used for noise suppression can degrade audio quality.
The MAF0603GWY series uses a newly developed low-distortion ferrite material. This material minimizes changes to audio-line characteristics and reduces audio distortion compared to chip beads. The filters provide impedance up to 3220 Ω at 5 GHz for noise attenuation in the high-frequency range exceeding 5 GHz. They feature lower DC resistance than conventional products, which reduces attenuation of audio signals and supports a wide dynamic range.
The series is designed for high-frequency noise countermeasures in smartphones, tablets, and wearable devices, including Bluetooth, Wi-Fi (2.4 GHz, 5 GHz, 6 GHz), 5G (Sub-6), and next-generation communication standards (6G).
Three variants are specified:
MAF0603GWY211AT000: Impedance 210 Ω at 900 MHz, 1370 Ω at 5 GHz; DC resistance 0.89 Ω (typ.), 1.30 Ω (max.); rated current 0.15 A (max.)
MAF0603GWY301AT000: Impedance 300 Ω at 900 MHz, 1890 Ω at 5 GHz; DC resistance 1.15 Ω (typ.), 1.50 Ω (max.); rated current 0.14 A (max.)
MAF0603GWY551AT000: Impedance 550 Ω at 900 MHz, 3220 Ω at 5 GHz; DC resistance 1.81 Ω (typ.), 2.20 Ω (max.); rated current 0.125 A (max.)
The impedance values at 5 GHz are stated as industry-leading as of April 2026 according to TDK.
