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AC-DC Power Supply Flagship Models Feature Compact Dimensions, High Efficiency, and Long Service Life

AC-DC Power Supply Flagship Models Feature Compact Dimensions, High Efficiency, and Long Service Life

July 11, 2013

TDK Corporation announces the successful development of the HWS-A series of TDK-Lambda brand AC-DC unit-type power supplies. The lineup comprises five models rated from 15 to 150 watts, meeting a wide range of customer requirements. Orders for the product will be accepted by TDK-Lambda Corporation (President: Yoshiaki Hirota) from September 17, 2013.

The new series represents an upgrade of the highly renowned flagship HWS series (15, 30, 50, 100, 150 W) which was originally introduced in 2005. The HWS-A series products (also rated for 15, 30, 50,100, 150 W) incorporate the latest technology by TDK-Lambda. High-efficiency design results in a 3% improvement in efficiency (at 150 W, 48 V) as compared to the predecessor models. Efficiency at low loads is 4 percent better (at 150 W, 48 V), and power consumption during standby is also lower, thereby contributing to a reduction in environmental impact. The service life of the electrolytic capacitors is rated for at least seven years, resulting in increased reliability, and use under rugged ambient conditions is also supported.

External dimensions, electrical specifications, and option lineup are fully compatible with the existing HWS series, making replacement from earlier products totally problem-free.

■ Glossary

  • Derating:
    Operating a component or equipment at less than its rated maximum power or output in order to increase reliability. In the case of power supplies, derating involves reducing the power output at higher ambient temperatures compared to the output at normal temperature.

■ Major applications

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

■ Main features and benefits

  • Improved output derating
    /A (type with cover): Ta = 50°C, Io = 100% (Note) Current HWS series: Ta = 40°C, Io = 100%
  • High efficiency: 91% (at 150 W, 48V), 3% improvement over current HWS series
  • Improved efficiency at low loads (4% improvement over current HWS series, at 150 W, 48 V), reduced power consumption in standby
  • Long service life: Electrolytic capacitors rated for minimum 7 years (Ta = 40°C, Io = 100%, 24 h)
  • Light weight: 12% less than current HWS series (15 W model)
  • Complete compatibility with current HWS series in external dimensions, electrical specifications, and option lineup, to enable easy replacement

■ Major specifications: HWS-A series (15, 30, 50, 100, 150 W)

Model HWS15A HWS30A HWS50A HWS100A HWS150A
Input voltage range 85 to 265Vac(120 to 370Vdc)(300Vac 5sec)
Nominal output voltage Vdc 3.3/5/12/15/24/48
Efficiency 24V
(200 Vac typ.)
% 85% 88% 87% 89% 90%
Maximum output power W 15W 30W 50W 100W 150W
Cooling Natural air cooling
Operating temperature -10 to +50: 100% (incl. type with cover), +60: 60%, +70: 40%
Leakage current mA <0.75
EMI Built to meet EN55022-B, CISPR22-B
Safety UL60950-1, CSA60950-1, EN60950-1, UL508 (type with cover)
Size (W x H x D) mm 26.5×82×80 26.5×82×95 26.5×82×120 28×82×160 37×82×160
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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