EMC Components
High-impedance chip beads with lowest DC resistance 

•	Lowest DC resistance for a chip bead of its size 
•	20 percent higher impedance than existing chip beads with the same DC resistance 
•	Compact dimensions of 0.4 mm x 0.2 mm x 0.2 mm

August 29, 2017

TDK Corporation announced the development of the MMZ0402EUC series of chip beads, with the lowest DC resistance for a chip bead its size*. The two new types with their respective impedance values of 150 Ω and 180 Ω at 100 MHz, feature DC resistance values of only 0.62 Ω and 0.69 Ω. This results in a significant reduction in power losses, while at the same time providing excellent noise suppression. In fact, the compact IEC 0402 components with dimensions of 0.4 mm x 0.2 mm x 0.2 mm feature an impedance that is up to 20 percent higher than TDK's existing MMZ chip beads with the same DC resistance rating. Combined with their higher rated currents of 350 mA and 300 mA compared to existing types, the new MMZ0402EUC chip beads are ideally suited for noise suppression in the power and signal circuits of smartphones, tablets and other mobile devices. Mass production was launched in August 2017.

The improved ratio of impedance to DC resistance of the new series was achieved thanks to advanced TDK materials. The components can be used in a wide range of temperatures from -55 °C to +125 °C. TDK will continue to expand the available range of impedance values in the compact lineup to meet the requirements for a broad range of mobile device designs. 

*		As of August 2017, according to TDK research

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Main applications
•	Smartphones, tablets, and other mobile devices 

Main features and benefits
•	Lowest DC resistance for a chip bead of its size, with values as low as 0.62 Ω
•	Impedance of 150 Ω and 180 Ω at 100 MHz is up to 20 percent higher than that of existing chip beads with the same DC resistance
•	Compact dimensions of just 0.4 mm x 0.2 mm x 0.2 mm
•	Wide operating temperature range from -55 °C to +125 °C

Key data 
Type	Dimensions
[mm]	Impedance
[Ω] at 100 MHz
typ.*	Impedance
[Ω] at 700 MHz typ.*	DC resistance
[Ω] max.	Rated current
[mA] max.	
MMZ0402EUC151C	0.4 x 0.2 x 0.2	150	340	0.62 	350	
MMZ0402EUC181C		180	400	0.69	300	

*		Tolerance ±25%

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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 portfolio includes passive components, such as ceramic, aluminum electrolytic and film capacitors, ferrites and inductors, high-frequency products, and piezo and protection components, as well as sensors and sensor systems and power supplies. These products are marketed under the product brands TDK, EPCOS, InvenSense, Micronas, Tronics and TDK-Lambda. TDK's further main product groups include magnetic application products, energy devices, and flash memory application devices. 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 2017, TDK posted total sales of USD 10.5 billion and employed about 100,000 people worldwide.

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You can download this text and associated images from www.global.tdk.com/news_center/press/201708294500.htm
Further information on the products can be found under product.tdk.com/info/en/catalog/datasheets/beads_commercial_signal_mmz0402_en.pdf 

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Contacts for regional media
Region	Contact		Phone	Mail	
Japan	Mr. Yoichi OSUGA	TDK Corporation
Tokyo, Japan	+813 6852-7102	pr@jp.tdk.com	
ASEAN	Ms. Jiang MAN
Ms. Pei Lu LEE 	TDK Singapore (Pte) Ltd.
Singapore	+65 6273 5022	asean.inquiry@sg.tdk.com	
Greater China	Ms. Clover XU	TDK China Co., Ltd.
Shanghai, China	+86 21 61962319	pr@cn.tdk.com	
Europe	Mr. Frank TRAMPNAU	TDK Europe GmbH
Duesseldorf, Germany	+49 211 9077 127	frank.trampnau@eu.tdk.com	
America	Ms. Sara M. LAMBETH	TDK Corporation of America
Irving, TX, USA	+1 972-409-4519	sara.lambeth@us.tdk.com