Inductors
Multilayer type in 0402 with world’s highest Q	

February 18, 2014

TDK Corporation has expanded its portfolio of MHQ-P high Q multilayer inductors with the miniature MHQ0402P series in case size IEC 0402. Measuring just 0.44 mm x 0.24 mm x 0.24 mm, the new inductors feature the highest Q factor for any multilayer inductor of its size* and are suitable for RF applications such as smartphones, tablets and other mobile devices. Mass production began in February 2014.

The MHQ0402P series achieves a Q factor of 20 at 1.0 GHz and an inductance of 0.2 nH. This value is more than 30 percent higher than that of TDK's existing MLG0402Q series. The achievement of such a high Q factor in extremely compact package was made possible by the use of TDK's proprietary dielectric materials technology and an internal electrode cross-section design with a high aspect ratio, combined with an optimized L-shaped terminal layout. The new 0402 components have a volume that is 70 percent smaller and a footprint that is 53 percent smaller than the MHQ0603P series (0.65 mm x 0.35 mm x 0.35 mm), the smallest MHQ-P high Q product to date.

Thanks to its miniature size and high Q, the new multilayer inductors are designed to make RF circuits in multifunctional mobile devices such as smartphones and tablets even more efficient. The MHQ0402P series joins TDK’s existing MHQ0603P and MHQ1005P (1.0 mm x 0.6 mm x 0.5 mm) high Q series to form a versatile lineup of solutions for a very wide range of applications.  

*		As of February 2014, according to TDK data

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Glossary
•	Q: The Q (quality) factor of an inductor is the ratio of its inductive reactance to its resistance at a given frequency, and is a measure of its efficiency. The higher the Q factor of the inductor, the closer it approaches the behavior of an ideal, lossless inductor.

Main applications
•	Smartphones, tablets, Bluetooth and WLAN devices
•	RF circuits and modules for mobile communication devices, including PAs, VCOs, and front-end modules

Main features and benefits
•	High Q factor contributes to reduced losses in RF circuits
•		70 percent smaller volume and 53 percent smaller footprint than the MHQ0603-P series, the smallest MHQ-P high Q product to date 

Key data 
Type	Inductance
[nH] 	Q factor
typ.	Self-resonant frequency [GHz] typ.	DC resistance
[Ω] typ.	Rated current
[mA] max.	
MHQ0402P	0.2 to 33.0 	14 to 30 
(at 1.8 GHz)	2.2 to 18.7 	0.02 to 2.48	130 to 320 	

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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 electronic components, modules and systems* marketed under the product brands TDK and EPCOS, power supplies, magnetic application products as well as energy devices, flash memory application devices, and others. TDK focuses on demanding markets in the areas of information and communication technology and consumer, automotive and industrial 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 2013, TDK posted total sales of USD 9.1 billion and employed about 80,000 people worldwide.

* The product portfolio includes ceramic, aluminum electrolytic and film capacitors, ferrites, inductors, high-frequency components such as surface acoustic wave (SAW) filter products and modules, piezo and protection components, and sensors.

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You can download this text and associated images from www.global.tdk.com/news_center/press/20140218783.htm. 
Further information on the products can be found under http://product.tdk.com/inductor/ind/en/documents/inductor_commercial_high-frequency_mhq_en.pdf:  

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Contacts for regional media
Region	Contact		Phone	Mail	
Japan	Ms. Mari KONISHI	TDK Corporation
Tokyo, Japan	+813 6852-7102	pr@jp.tdk.com	
ASEAN 	Ms. Jiang MAN
Mr. Shota KANZAKI	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 61962307	pr@cn.tdk.com	
Europe 	Mr. Frank TRAMPNAU	TDK Electronics Europe GmbH
Duesseldorf, Germany	+49 211 9077 127	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