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Simple Function Type Compact AC-DC Power Supply RWS-B Developed

Simple Function Type Compact AC-DC Power Supply RWS-B Developed

July 11, 2013

TDK Corporation announces the successful development of the TDK-Lambda brand RWS-B series of AC-DC power supplies. The lineup comprises four models rated from 100 to 600 watts, featuring simple function design, compact dimensions, and high efficiency to meet a wide range of customer requirements. Orders for the product will be accepted by TDK-Lambda Corporation from September 17, 2013.

The RWS-B series (100, 150, 300, 600 W) is based on a different concept from existing power supplies. The new "simple function" type models are designed to deliver solid basic performance with additional functionality optimized with regard to customer requirements and specific applications. The flagship HWS series from TDK-Lambda represents the high end with a full complement of functions, while the RWS-B series is positioned as a mid-range product with simple functionality. By offering the HWS series and RWS-B series in a dual lineup configuration, we are able to respond even more flexibly to customers' needs and requirements.

The RWS-B series reflects latest TDK-Lambda technology in a simplified, compact, highly efficient power supply package. Efficiency at low loads and power consumption during standby has also been improved. Covering a wide range from low to high power applications, the series also contributes to a reduction in environmental impact. The service life of the electrolytic capacitors is rated for at least five years, resulting in increased reliability, and use under rugged ambient conditions is also supported.

■ Major applications

General industrial equipment including automated devices for industrial and commercial applications, measuring instruments, communications equipment, etc.

■ Main features and benefits

  • Simple function models with solid basic performance and optimized additional functionality
  • Long service life: Electrolytic capacitors rated for minimum 5 years (Ta = 40°C, Io = 100%, 24 h)
  • Standard model equipped with cover
  • Model with DIN rail mounting brackets available as option
  • 24 V output type compliant with UL 508 standard

■ Major specifications: RWS-B (100, 150, 300, 600 W)

Model RWS100B RWS150B RWS300B RWS600B
Input voltage range 100,150,300W:85 to 265Vac (120 to 370Vdc) (300Vac 5sec)
600W:85 to 265Vac (120 to 330Vdc) (300Vac 5sec)
Nominal output voltage Vdc 5/12/24/48 5/12/15/24/36/48
Efficiency 24 V
(200 Vac typ.)
% 87% 89% 88% 88%
Maximum output power W 100W 150W 300W 600W
Cooling Natural air cooling Forced cooling
Operating ambient temperature 100,150W:-10 to +40:100%, +70:20%
300W:-10 to +50:100%, +70:20%
600W:-20 to +50:100%, +70:20%
Leakage current mA <0.75
EMI Built to meet EN55022-B, CISPR22-B
Safety standard UL60950-1、CSA60950-1、UL508(24V type)
Size (W x H x D) mm 94 ×39 ×108 94 ×41×128 102×41×170 120 ×61×190
Warranty 5 years (with conditions)

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, a member company of the TDK group, markets a wide range of high reliability power supplies on a worldwide basis as a leading company in the market of power supplies for industrial equipment. It has a global network of 5 R & D centers (Japan, China, Europe, USA and Asia) and offers a complete set of services from R & D and production through sales and maintenance to meet diversified customer needs. 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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