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Power Supply Products
Max. Output Power 300 W, 1/8 Brick Size Digital Control Bus Converter iEH Series Developed

PFE-SA Series of High Efficiency AC-DC Power Modules with Conduction Cooling Developed

September 30, 2013

TDK Corporation announces the successful development of the TDK-Lambda brand iEH series of digital control bus converter. While conforming to the industry standard 1/8 brick form factor, the new products can supply high output power up to 300 watts, thereby contributing to size reduction in customer products. Orders for the product will be accepted by TDK-Lambda Corporation (President: Yoshiaki Hirota) from November 25, 2013.

The iEH series employs digital control which allows optimization of parts and reduction of parts count. As a result, efficiency is as high as 94.6% (12 V output type). Compared to the highly renowned 1/4 brick size bus converter iQG series, the new series achieves a 36% size reduction and a 21% increase in power density.

Consequently, customers will benefit from a higher degree of freedom for equipment design, allowing the realization of end products with smaller sizes, higher efficiency, and higher power density. Pin layout and functions are compatible with the iQG series, to facilitate designing changes.

■ Major applications

General industrial equipment, semiconductor manufacturing equipment, measuring equipment, ICT equipment

■ Main features and benefits

  • Control principle: Digital control
  • Dimensions: Industry standard 1/8 brick size
  • Efficiency: 94.6% (series maximum)

■ Major specifications: iEH series

Model iEH48028A108V iEH48025A120V
Input voltage 36 to 75 V DC
Nominal output voltage 10.8 VdC 12 VdC
Efficiency (48 V DC, typ.) 94%


Maximum output power 302.4 W 300 W
Cooling Convection cooling/Forced cooling
Operating temperature -40°C to +85°C
Safety standards UL60950-1, CSA60950-1, EN60950-1
Dimensions (W x H x D) 22.86 x 13.46 x 58.42 mm  (1/8 brick size)
Warranty 3 years

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 which are 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.

About TDK-Lambda Corporation

TDK-Lambda Corporation, a group company of TDK Corporation, is a leading global power supply company providing highly reliable power supplies for industrial equipment worldwide. TDK-Lambda Corporation meets the various needs of customers with our entire range of activities, from research and development through to manufacturing, sales, and service with bases in five key areas, covering Japan, Europe, America, China, and Asia. For more details, please pay a visit to


Contacts for regional media

Region Contact Phone Mail
Japan Ms. Mari KONISHI TDK Corporation
Tokyo, Japan
+81 3 6852-7102

Product Information

Product information on this web site is intended only for the Japanese market.

For other markets, please access the respective regional web site or contact your nearest sales office.

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