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EMC components: High current noise suppression filters for speakers

  • TDK's proprietary low-distortion ferrite material enables high audio quality
  • High rated current of 2 A or higher makes smart speakers and external speakers
EMC components: High current noise suppression filters for speakers

December 10, 2019

TDK Corporation (TSE:6762) expanded the MAF series of noise suppression filters with two new MAF1608GAD-L types that are designed for audio lines. The new multilayer filters have a compact footprint of just 1.6 x 0.8 mm and an insertion height of just 0.6 mm and are able to suppress noise at cellular frequencies from 1 GHz and Class D amplifier noises and ensure high attenuation quality. They offer rated currents of 3.2 and 2.3 A, respectively, and low DC resistances of typically just 0.021 and 0.045 Ω. Their impedance at 900 MHz is 120 and 200 Ω, respectively. Thanks to their low DC resistance and high rated current of more than 2 A, the new components are especially suitable for smart speakers and external speakers for tablets that require power levels of 2 W or higher as well as for headphones and microphones. Mass production began in December 2019.

The MAF series, including the new MAF1608GAD-L types, use a low-distortion ferrite material, which very effectively suppresses noise. These filters in the speaker line thus significantly improve reception sensitivity and solve the problem of sound quality degradation that occurs when using conventional chip beads. The new components complement the MAF1005GAD types for headphones and the microphone lines of smartphones. TDK will continue to expand its portfolio to respond to the needs for noise reduction and high audio quality.

Main applications

  • Smart speakers, external speakers for tablets, headphones and microphones

Main features and benefits

  • Low-distortion ferrite material effectively suppresses noise and enables low audio distortion
  • High rated current of 2 A or higher enables use in smart speakers and external speakers

Key data

Type Typ. Impedance
at 900 MHz [Ω]
Typ. DC
resistance [Ω]
Max. DC
resistance [Ω]
current [A]
MAF1608GAD121L- 120 0.021 0.027 3.2
MAF1608GAD201L 200 0.045 0.059 2.3

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 2019, TDK posted total sales of USD 12.5 billion and employed about 105,000 people worldwide.


Contacts for regional media

Japan Mr. Yoichi OSUGA TDK Corporation
Tokyo, Japan
+813 6778-1055
Ms. Pei Lu LEE
TDK Singapore (Pte) Ltd. Singapore +65 6273 5022
Greater China Ms. Clover XU TDK China Co., Ltd.
Shanghai, China
+86 21 61962319
Europe Mr. Frank TRAMPNAU TDK Europe GmbH
Duesseldorf, Germany
+49 211 9077 127
America Ms. Sara M. LAMBETH TDK Corporation of America
Irving, TX, USA
+1 972-409-4519