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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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Specific inquiries

Press office

For press related inquiries, please go to the press office.
Latest pressrelease:
Powerbox releases its United Nations Global Compact Communication On Progress report 2018

Powerbox distributors

Please find our distributors here.

Job openings


Quality and Environmental Manager
Read more here: Quality and Environmental Manager


Entwickler (m/w) von Stromversorgungslösungen
Read more here: Entwickler (m/w) von Stromversorgungslösungen

Technischer Mitarbeiter für den Betriebsmittelbau (m/w)
Read more here: Technischer Mitarbeiter für den Betriebsmittelbau (m/w)

Technischer Assistent für die Entwicklung (m/w)
Read more here: Technischer Assistent für die Entwicklung (m/w)

Contact us

Our offices

Please find your nearest Powerbox office.
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Head office

Industrigatan 8
646 35 GNESTA, Sweden
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Read more

Powerbox announces power solution for high speed e-commerce hub conveyers

Powerbox announces the introduction of its ENI250A series designed to deliver peak power to motor start or/and high capacitive loads in factory automation applications.

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COSEL’s very high reliability 40W DC/DC converter for demanding applications offers 10 year warranty

COSEL’s very high reliability 40W DC/DC converter for demanding applications offers 10 year warranty

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Powerbox’s S-CAP BOOST selected by the electronics Industry as one of the most significant products of the year!

Powerbox proudly announces that its new S-CAP BOOST platform has been selected by EDN magazine as one of the most significant products of the year.

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Powerbox announces power supply industry’s first Cosel portable product selector app

Cosel market first portable Product Selector App developed to operate across all mobile devices and computers, even without internet connection.

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