Green AC/DC Power Supply offers 93% efficiency, ErP compliance.

Press Release Summary:

Compliant with European ErP (Energy related Products) Directive, convection-cooled GWS250 series is comprised of 4 models that are rated at 250 W and offer user-adjustable (up to 20%) nominal outputs of 12, 24, 36, and 48 V. Models with 24 and 36 V outputs have peak power rating of 300 W, but all models measure 4.1 x 7.8 x 1.61 in. Consuming less than 0.5 W (no load) in standby, series can be operated at full load from -25 to +50°C ambient and up to +70°C with suitable derating.

Original Press Release:

Green 250W Power Supplies Introduced by TDK-Lambda

Combines 93% efficiency with ErP compliance

San Diego, CA - TDK-Lambda Americas, a group company of the TDK Corporation, has introduced a new line of "green" 250-watt power supplies that comply with the European energy saving requirements of the ErP (Energy related Products) Directive. Ideal for use in industrial, broadcast, and communications applications, the GWS250 series AC-DC power supplies employ innovative design techniques to combine high efficiency, high power density and low standby power consumption (<0.5W, no-load) with the confidence of a 5-year warranty. The GWS250 is equally well-suited for indoor as well as outdoor applications, including: LED information displays, digital signage, traffic controls, test and measurement and audio/visual systems.

Designed with a 4.1 x 7.8 inch footprint and less than 1U height (1.61"), the GWS250 is a compact, convection-cooled power supply that fits into spaces previously requiring fan-cooled supplies. Rated at 250W, this series is offered in four models with nominal outputs of 12V, 24V, 36V and 48V. Outputs are user adjustable by up to 20% depending on the model - and the 24V and 36V models have a peak power rating of 300W. With a very flat efficiency curve averaging 92.7% from 25 to 100% load, the GWS250 series can be operated at full load from -25 to +50°C ambient temperature and up to +70°C with suitable derating. Since the GWS250 is convection-cooled and does not have a fan, it is ideal for applications requiring low audible noise as well as for equipment where long life is a critical factor, such as in remote locations and dusty environments.

The GWS250 series includes overvoltage, overtemperature and overcurrent protections. Models also feature <0.5W no-load power consumption, 5V/0.3A standby output, remote on/off, DC GOOD signal and a programmable output function, as standard.

CE marked in accordance with the LV Directive, the GWS250 carries a host of environmental and safety approvals including EN55022 and FCC Class B, UL60950-1, CSA C22.2 No.60950-1-07 (cUL), EN60950-1 edition 2 and IEC60950-1.

These units are available now and economically priced, starting at $140.00 each in 250 piece quantities. More information is available at TDK-Lambda Americas' website: or by calling 1-800-LAMBDA-4.

Meeting Future ErP Requirements Today
Within the EU (European Union) in November 2009 the EuP (Eco-design Directive for Energy-using Products) was replaced by the new ErP (Energy-related Products Directive, 2009/125/EC). One of the first measures implemented under the ErP Directive relates to the no-load power consumption. Initially, this has been set at less than 1W. However, it is expected to drop to below 0.5W by January 2013. With this in mind, TDK-Lambda designed the GWS series with less than 0.5W no-load standby power, helping designers achieve existing regulations now and ensuring that end systems are future-proofed beyond January 2013.

About TDK-Lambda Americas
TDK-Lambda Americas, a group company of TDK Corporation, is a leading global electronics company and has been a major provider of power solutions for over 60 years. The company designs and manufactures a wide range of AC-DC and DC-DC power products for Medical, Industrial, Communications and Test & Measurement applications worldwide. For more informa-tion, call TDK-Lambda Americas directly at 619-575-4400 or visit the website at:

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