Market Overview

High Current Noise Suppression Filters for Audio Lines

  • High rated current of up to 1.25 A and suited especially for external
  • Low-distortion ferrite material enables high audio quality
  • Miniature IEC 1005 case size

TDK Corporation (TSE:6762) has expanded the MAF1005G series of noise
suppression filters for audio lines with four new MAF1005GAD-D types,
which, thanks to their low DC resistance, feature a high rated current
of up to 1.25 A. The new types employ TDK's proprietary low-distortion
ferrite that enables the new components to suppress noise at cellular
frequencies from 600 MHz to 2.7 GHz and ensure high audio quality.
Thanks to their high rated current, the new components are suitable
especially for the audio lines for external speakers of smartphones and
other compact communication devices as well as for headphones and

Available in case size IEC 1005, the new noise suppression filters have
miniaturized dimensions of just 1.0 mm x 0.5 mm x 0.5 mm and feature a
performance approaching that of the much larger MAF1608G series in IEC
1608. Mass production of the components starts in September 2018.

With this series extension, TDK now offers a broad lineup of noise
suppression filters for cellular band frequencies, Class D amplifiers
(100 MHz to 400 MHz) and FM band frequencies (66 MHz to 108 MHz). TDK
will continue to expand its portfolio for more target band frequencies
and further miniaturization.

Main applications

  • Audio lines especially for external speakers of smartphones, tablets
    and other compact communication devices as well as for headphones and

Main features and benefits

  • Low DC resistance design for a high rated current of up to 1.25 A
  • Low-distortion ferrite material enables high audio quality
  • Miniature dimensions of 1.0 mm x 0.5 mm x 0.5 mm

Key data

Type     Impedance
at 900 MHz [Ω]
    DC resistance

Max. rated
current [A]

MAF1005GAD251D     250     0.110     1.25
MAF1005GAD401D     400     0.160     1.0
MAF1005GAD571D     570     0.200     0.9
MAF1005GAD701D     700     0.270     0.8

About TDK Corporation

TDK Corporation is a leading electronics company based in Tokyo, Japan.
It was established in 1935 to commercialize ferrite, a key material in
electronic and magnetic products. TDK's comprehensive portfolio features
passive components such as ceramic, aluminum electrolytic and film
capacitors, as well as magnetics, high-frequency, and piezo and
protection devices. The product spectrum also includes sensors and
sensor systems such as temperature and pressure, magnetic, and MEMS
sensors. In addition, TDK provides power supplies and energy devices,
magnetic heads and more. These products are marketed under the product
brands TDK, EPCOS, InvenSense, Micronas, Tronics and TDK-Lambda. TDK
focuses on demanding markets in the areas of information and
communication technology and automotive, industrial and consumer
electronics. The company has a network of design and manufacturing
locations and sales offices in Asia, Europe, and in North and South
America. In fiscal 2018, TDK posted total sales of USD 12 billion and
employed about 103,000 people worldwide.

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