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About us

Founded in 1974, with headquarters in Sweden and operations in 15 countries across four continents, Powerbox serves customers all around the globe. The company focuses on four major markets – industrial, medical, transportation/railway and defense – for which it designs and markets premium quality power conversion systems for demanding applications. Powerbox’s mission is to use its expertise to increase customers’ competitiveness by meeting all of their power needs. Every aspect of the company’s business is focused on that goal, from the design of advanced components that go into products, through to high levels of customer service. Powerbox is recognized for technical innovations that reduce energy consumption and its ability to manage full product lifecycles while minimizing environmental impact. Powerbox is a Cosel Group Company.

Established in Japan 1969, COSEL is one of the world’s leading designers and manufacturers of high performance AC-DC Power Supplies, DC-DC Converters and EMI Filters. With quality, reliability & flexibility as our main focus, we pride ourselves on developing some of the highest quality and most reliable products seen anywhere in the world today. COSEL is a $284m global company employing some 790 staff with sales offices throughout Japan, Asia, Europe and North America.


Our products are at the heart of what makes delicate and complex systems tick. We take from volts to kilovolts, and from watts to kilowatts. We’re the people you turn to when you need to keep a high-speed train in motion, when power must be maintained safely underwater or at 36,000 feet, or when someone’s life depends on a steady power supply to a critical medical device.
We are masters of power.

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PRBX - A Cosel Group Company

COSEL Corporate
COSEL Europe

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For press related inquiries, please go to the press office.
Latest pressrelease:
COSEL Group announces two technology leading products are finalists in the prestigious Elektra Awards

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Job openings


Sales Development Manager – New carrier opportunity at Powerbox Israel
Read more here: Sales Development Manager

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Our offices

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Head office

Industrigatan 8
646 35 GNESTA, Sweden
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COSEL Group announces two technology leading products are finalists in the prestigious Elektra Awards

Cosel Co, Ltd (6905: Tokyo) has announced that two leading products from the Cosel group, the COSEL RBC200F 200W AC/DC power supply tailored for small and medium robotics and the POWERBOX ENI250A microprocessor controlled power supply for factory automation applications have been selected by the Elektra Awards committee as a finalists in the highly contested Power System Product of the Year category.

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COSEL’s configurable power supplies shorten time to market for medical applications

Cosel Co, Ltd (6905: Tokyo) today announced a complete line up of configurable power supplies for medical applications, the AME series.

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For use in demanding applications, COSEL’s very high reliability 80W DC/DC converter comes with 10 year warranty

Cosel today announced the release of a very high reliability 80W DC/DC converter, the MGF80.

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PRBX new extra wide input DC/DC shorten time to market for demanding and ruggedized applications

Powerbox announces the launch of three new series of extra-wide input voltage range, 40W to 100W board-mounted DC/DC converters for the railway, transportation and defense industries.

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