XP Power launches convection cooled 250 W AC-DC power supplies in 3" x 5"

XP Power has today launched the CHD250 AC-DC power supply series of ultra-efficient 250 Watt convection cooled single-output units for applications that require medium power in an open frame, fan-less design. With a compact 3 x 5" standard footprint that fits within a 1U height, the series meets international safety approvals for industrial and medical equipment.

The CHD250 series offers a low no-load power consumption of less than 0.5 W. Featuring an almost flat efficiency curve over the entire load range, the series achieves an exceptional efficiency of between 93 and 94% typical at 230 VAC and full load, assisting end customers in meeting energy saving criteria of new ‘green’ standards and minimising waste heat. In addition, the high efficiency allows the units to be convection-cooled, eliminating the need for cooling fans, making the series especially suitable for low audible noise requirements.

The range comprises five models, providing output voltages of + 12, 15, 24, 28 and 48 VDC. Standard features include a power fail signal, output inhibit and remote sense, plus adjustment of the output voltage by the user of +5/-4%. To ensure that customers only pay for what they need, options for this series include a 5 VDC / 0.5A standby output for powering memory or logic and a covered version.

The CHD250 series meets IT 60950-1 and 3rd edition ANSI/AAMI ES60601-1 safety approvals (achieving 2 x MOPP), as well as EMC specifications EN55022/11 for class B conducted emissions. The supplies are capable of operating over a wide temperature range of – 20 to + 70 degrees C with no derating until + 50 degrees C.

With an industry-standard footprint of 3.0 x 5.0 x 1.43 inches, these units are open frame with no U bracket or L bracket heatsink.

The CHD250 series is priced at $136.50 for 500 pcs orders and is available from Newark, Digi-Key, or direct from and come with a 3 year warranty.


For further information and reader enquiries:

Duane Darrow, XP Power, 990 Benecia Avenue, Sunnyvale, CA 94085

Tel: (971)-322-0326 Email: ddarrow@xppower.com

Fax: (408)-732-2002 Web: www.xppower.com

William Sng SK, XP Power (Singapore) PTE LTD

Tel: +65 68469368 Email: wsng@xppower.com

Fax: +65 67418730 Web: www.xppower.com

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Lexi Hatziharalambous, Publitek Limited, 18 Brock Street, Bath, BA1 2LW, United Kingdom

Tel: +44 (0) 1225 470000 E-mail: lexi.hatzi@publitek.com

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Notes to editors

XP Power is committed to being a leading provider of power solutions, including AC-DC power supplies and DC-DC converters. With ISO9001:2008, XP Power offers total quality, from in-house design through to manufacturing facilities around the world. The company offers the widest range of power products available from one source and unrivalled technical and customer support, aiding both vendor consolidation and cost reduction programmes. XP has 27 sales offices throughout Europe, North America and Asia.

XP Power Ltd, a London Stock Exchange listed public company, has design centres in Fyfield (UK), Orange County (California), and Singapore, which also serves as the company’s headquarters. Manufacturing is carried out near Shanghai, China and Ho Chi Minh City, Vietnam. The design teams push back the boundaries of cost and technology, providing market leading power products. Dedicated in-house Engineered Solutions teams provide customer specific solutions, with rapid response times. The applications team provide expert technical support to help customers integrate and use XP power products worldwide.


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