Powerbox International AB

What Powerbox International AB does

Powerbox International AB is a Swedish power supply manufacturer founded in 1974, specializing in standard, modified-standard, and full custom power conversion solutions for demanding applications. The company operates R&D and design centers in Sweden (headquarters in Hägersten/Stockholm), Germany (via acquired subsidiary EPLAX GmbH in Bremen), and the Netherlands (Etten-Leur), with sales and support presence across 15 countries spanning Europe, North America, China, and Australia. Its product portfolio spans AC/DC power supplies, DC/DC converters, battery backup systems, and custom power solutions targeting medical, defense, transportation/railway, industrial, marine, and automotive verticals, supported by a library of more than 3,500 implemented power supply solutions and proprietary technologies including S-CAP BOOST (supercapacitor-based peak power), Coreless Power Conversion (for high magnetic field environments such as MRI), and the PRBX-ERPS railway platform.

The business monetizes through direct enterprise field sales supplemented by regional distribution partners (WPG Americas in North America since 2015, Acumen in Southeast Asia, Fusion Sourcing Group), with quote-based pricing on multi-year contracts and no public price list. Revenue streams include standard catalog product sales, modified-standard configurations, full custom design and manufacturing, and integration/system assembly services. The company was acquired by Japan's COSEL Co., Ltd. (TSE: 6905) in June 2018 at a consolidated turnover above €40M with 120 employees, and operated as "A Cosel Group Company" for the next eight years. In May 2026, Powerbox announced an ownership transition to Hypax with stated continuity for customers and partners, while the broader group-level COSELSYNC alliance with LITE-ON Technology Corporation (April 2024) extends the parent's standard-power ambitions.

Customer mix is concentrated in regulated, mission-critical segments — medical devices (Elekta Gamma Knife system has run with zero field defects after 8 years in field), rail rolling stock and trackside (EN50155-compliant DC/DC converters and battery chargers), defense (US Navy shipboard lighting, airborne mission computers, MIL-STD-810H/461-compliant power supplies), and industrial automation — where product qualification cycles and certification overhead (EN50155, MIL-STD, IEC60601-1-2, DNV, ATEX/IECEx) create high entry barriers but limit scalability through long design-in lead times.

Name

Powerbox International AB

Legal name

Powerbox International AB

Website

https://prbx.com

Company type

Private

Founded year

1974

Operating status

Operating

Headcount range

51–100 employees

Short description

Powerbox International AB is a Sweden-based power supply manufacturer designing standard, modified-standard, and custom AC/DC and DC/DC power conversion solutions for demanding medical, defense, railway, and industrial applications, operating under a transitioning corporate parent.

Ownership category

akta.pro rank

Product category

Industrial Power Supplies

NAICS

Switchgear and Switchboard Apparatus Manufacturing (335313), Relay and Industrial Control Manufacturing (335314), Electrical Equipment Manufacturing (3353)

SIC

Switchgear & Switchboard Apparatus (3613), Power, Distribution & Specialty Transformers (3612)

akta.pro primary industry

AC-DC Power Supplies (Industrial PSUs, DIN-rail, enclosed/open-frame) (IMAGADAA)

akta.pro secondary industries

Medium/Low-Voltage Power Distribution (MCCs, Panels, UPS, Grounding) (EUAEAFAB), Industrial Control Cabinets & Power Distribution (Panels, Switchgear for Automation) (IMAHAHAK)

Keywords

• Industrial power supplies
• DC/DC converters
• Railway power solutions
• Medical power supplies
• Custom power solutions

Headquarters

HQ city

Gnesta

HQ country

Sweden

HQ region

Europe

Offices7 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Technology or R&D, Supply Chain, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Standard Power Supplies: Sale of standard AC/DC and DC/DC power supply products from catalog
2. Modified Standard Products: Sale of modified standard power supplies with custom modifications for specific applications
3. Custom Power Solutions: Full custom power supply design and manufacturing services for demanding applications, with over 3,500 custom solutions delivered
4. Integration and System Assembly: Integration services including cabinet systems, racks, subracks, and complete power system assembly

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels7 records

Core offering

Powerbox International AB designs, manufactures, sells and supports standard, modified-standard and fully custom power supply solutions (AC/DC power supplies, DC/DC converters and battery backup systems) for demanding applications in the railway, medical, defense and industrial sectors. The company operates three design centers (Sweden, Germany, Netherlands) and serves customers across 15 countries, delivering highly engineered power solutions with certifications to EN50155, MIL-STD, IEC60601-1-2 and ISO 13485.

Product overview

Powerbox International AB is a power supply manufacturer specializing in standard, modified-standard, and custom power solutions for demanding applications. The company operates as a Cosel Group Company with over 50 years of experience and more than 3,500 implemented power supply solutions. The product portfolio spans multiple specialized product lines: Railway Line products (ENAR150D, ENR1000-PC, BBU1200 Series, ENR10000, GB140, GB200) for rolling stock and trackside applications; Defense Line products (OFD1200A, ECDA Series) with MIL-STD ruggedization and IP65 ratings; Industrial Line products (OFI700A, OFI1200A, PHB300W, PAE, PAF, PED, PQAE, PME series) featuring DC/DC converters with various power ratings and input ranges; and the TUNS Series of board-level AC/DC power supplies with PFC front-end for conduction cooling. The company also offers the proprietary S-CAP BOOST peak power technology and acquired Eplax (Germany) and Power Technics assets to strengthen its custom design capabilities.

Differentiator

Problem solved

Functional benefit

Products and services

• ENAR150D Series 150W dual output DC/DC converter for railway applications with typical 93% efficiency, operating temperature range -40 to +70 degrees C, approved to EN50155, EN50121-3-2, EN61373 and EN45545 standards. Targeted at railway system integrators and rolling stock OEMs.
• ENR1000-PC Series Battery to HVDC pre-charger unit for railway applications designed to deliver peak power to high capacitive loads. Targeted at railway modernization and rolling stock refurbishment programs.
• BBU1200 Series Battery Backup Unit Configurable Battery Back-up Unit system with scalable configurations from 340W to 1200W, featuring active PFC input, micro-controlled smart charging, automatic battery health testing, GSM/3G/LTE remote monitoring and integrated output distribution. For railway and industrial backup applications.
• ENR10000 Series 110VDC input, 10kW battery charger for railway applications, designed for full compatibility with existing equipment during refurbishing or modernizing trains. For rail operators and rolling stock integrators.
• GB140 DC/DC Converter DC/DC converter for railway systems. Targeted at railway trackside and rolling stock power distribution.
• GB200 DC/DC Repeater DC/DC repeater for railway applications. Used by railway system integrators for extending power distribution on rolling stock and trackside systems.
• PQB50U-72S Series 50W extra wide input DC/DC converter with 12:1 input voltage range for industrial and railway applications. Targets wide-input rail and battery-fed industrial systems.
• ECDA Series IP65 AC/DC Power Supplies Fully sealed IP65 rated AC/DC power supplies (500W/700W/1000W) for outdoor and exposed defense environments with conductive cooling, available in 12V and 28V outputs. Targeted at defense and harsh-environment system integrators.
• OFD1200A Series 1200W baseplate-cooled AC/DC power supply for defense applications meeting MIL-STD-461 CE102 and RE102 emissions standards, MIL-STD-810H mechanical ruggedization, and MIL-STD-1399-300. Available in 12V, 28V, 48V and 65V outputs, scalable to 9.72kW in parallel. For defense primes and military system integrators.
• OFI1200A Series 1200W open-frame fanless AC/DC power supply optimized for industrial conduction cooling applications with baseplate temperature range -40 to +95 degrees C, universal input 85-305VAC with PFC, available in 12V/84A, 28V/43A and 48V/25A versions with typical 92% efficiency. For industrial OEMs and system integrators.
• OFI700A Series 700W open-frame fanless AC/DC power supply for industrial applications with conduction cooling, operating -40 to +95 degrees C baseplate, wide input 85-264VAC with PFC and DC input 120-350VDC, available in 12V, 28V and 48V outputs with optional 1+1 redundancy active ORing. For industrial OEMs and system integrators.
• TUNS Series Universal input PFC front-end with DC-DC converter combined into single module for conduction cooling applications. TUNS300/500 are compact full brick size achieving up to 90% efficiency with digital assist control and built-in microprocessor, featuring 5-year warranty and peak power capability up to 130% for 10 seconds (TUNS500). Targeted at industrial and harsh-environment OEMs.
• PHB300W-110S Series 300W 4:1 input single output DC/DC converter for industrial applications. Targets industrial automation and equipment OEMs requiring wide-input DC bus conversion.
• PAE150W Series Up to 182W 4:1 single output DC/DC converter for industrial applications. Targeted at industrial OEMs needing medium-power wide-input conversion.
• PAE200W Series Up to 240W single output DC/DC converter for industrial applications. Targeted at industrial OEMs needing higher-power wide-input conversion.
• PAF(D)150 Series 150W 4:1 single output DC/DC converter. Targeted at industrial OEMs needing compact 150W wide-input conversion.
• PED40W Series 40W 4:1 wide input single and dual output DC/DC converter for industrial applications. Targeted at low-power industrial systems.
• PQAE100W Series Up to 90W 4:1 wide input quarter brick DC/DC converter for industrial applications. Targeted at industrial OEMs needing quarter-brick form factor conversion.
• PQAE150W Series Up to 132W 4:1 wide input quarter brick DC/DC converter. Targeted at industrial OEMs needing higher-power quarter-brick conversion.
• PQAE40U Series Up to 40W 12:1 ultra wide input quarter brick DC/DC converter for industrial applications. Targeted at battery-fed industrial systems.
• PQAE60U Series Up to 60W 12:1 ultra wide input quarter brick DC/DC converter for industrial applications. Targeted at battery-fed industrial systems.
• PQAE100U Series Up to 100W 12:1 ultra wide input quarter brick DC/DC converter. Targeted at higher-power battery-fed industrial systems.
• PME08W Series (T8W) 8W 4:1 single and dual output high performance DC/DC converter for industrial applications. Targeted at low-power point-of-load industrial conversion.
• S-CAP BOOST Peak Power Solution Breakthrough supercapacitor-based peak power technology delivering high peak energy levels with fast energy recovery for industrial and medical applications requiring short bursts of high power. Selected by EDN magazine as one of the most significant products of the year (2019).
• Coreless Power Conversion Technology Breakthrough coreless power conversion technology for high magnetic field applications such as MRI equipment operating in 2-4 Tesla magnetic field environments. Won Power Product of the Year at the 2018 Elektra Awards.
• ECDD DC/DC Series New ruggedized DC/DC series targeting defense and harsh environments, expanding Powerbox's COTS/MOTS defense product range. Launched in May 2026.
• COTS/MOTS 1000W IP65 Power Supplies COTS/MOTS 1000W IP65 rated ruggedized power supplies for defense and harsh environments.
• COTS/MOTS 1200W Power Supplies COTS/MOTS 1200W power supplies for defense and harsh environments.
• Custom Power Solutions and Integration Services Full custom power supply design and manufacturing services for demanding applications, with over 3,500 custom solutions delivered, plus integration services including cabinet systems, racks, subracks and complete power system assembly. Targeted at enterprise OEMs requiring application-specific power designs.

Quantifiable outcome

• Zero field defects reported for Gamma Knife surgical system after 8 years in operation
• +3 more outcomes

Named customers10 records

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Nine partnerships are on record, tiered core, minor and regional.

• LITE-ON TECHNOLOGY CORPORATIONcoreStrategic or Co-development Partner · 30 April 2024COSEL entered into a capital and business alliance agreement with LITE-ON TECHNOLOGY CORPORATION under joint vision to 'Become a Worldwide Leading Brand in Standard Power Solution'.
• Power Sources Manufacturers Association (PSMA)minorStrategic or Co-development Partner · 27 February 2017Powerbox joined the Power Sources Manufacturers Association, an industry association for power supply manufacturers.
• United Nations Global CompactminorStrategic or Co-development Partner · 25 January 2017Powerbox became Participant to the U.N. Global Compact in January 2018, aligning with global principles related to human rights, labor conditions, environment, and anti-corruption.
• Fusion Sourcing GroupregionalChannel Partner/ Reseller/ Distributor · 8 December 2016Added manufacturers' representative Fusion Sourcing Group to North America sales team.
• AcumenregionalChannel Partner/ Reseller/ Distributor · 16 May 2016Powerbox appointed Acumen to increase support to South East Asian customers and contract manufacturers.
• EPLAX GmbHcoreStrategic or Co-development Partner · 3 May 2016Powerbox acquired EPLAX GmbH in May 2016, strengthening custom power solutions for demanding applications. EPLAX, based in Bremen, Germany, has been developing and manufacturing power supplies since 1976.
• Power TechnicsminorStrategic or Co-development Partner · 12 April 2016Powerbox acquired assets of Power Technics, strengthening design capabilities for demanding applications.
• WPG Americas Inc.coreChannel Partner/ Reseller/ Distributor · 26 May 2015WPG Americas Inc. became new distributor for Powerbox in North America, providing sales coverage and distribution in the region.
• VicorcoreChannel Partner/ Reseller/ Distributor · 22 April 2014Strengthened distribution partnership in Europe with Vicor for power components, enhancing product offering for demanding applications.

Scale indicators7 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Vicor Corporation: Vicor designs and manufactures modular power components and complete power systems for industrial, defense, and railway applications. PRBX has a distribution partnership with Vicor in Europe, indicating product overlap in high-density DC/DC conversion and similar customer base.
• Bel Fuse: Bel Fuse designs and manufactures power conversion products (AC/DC, DC/DC) as well as magnetics and circuit protection for industrial, aerospace, defense, and telecommunications markets. Comparable vertical diversification and product mix to PRBX.
• XP Power: XP Power is a leading developer and manufacturer of critical power supply solutions for the industrial, healthcare, and semiconductor manufacturing markets. Highly comparable to PRBX in target verticals (medical, industrial), product portfolio (AC/DC, DC/DC), and channel structure.
• RECOM Power: RECOM Power manufactures AC/DC, DC/DC converters and switching regulators for industrial, railway, medical, and defense markets. Highly comparable to PRBX in product breadth, vertical focus, and customization capabilities, with similar mid-sized European presence.

Broad incumbents

• Cosel Co., Ltd. Cosel is PRBX's parent company (since 2018) and a leading Japanese manufacturer of AC/DC and DC/DC power supplies. While serving as parent, Cosel also competes directly in industrial and railway markets, making it both owner and a partially overlapping competitor.
• Artesyn Embedded Power (Advanced Energy): Artesyn, now part of Advanced Energy, designs and manufactures highly reliable power conversion solutions for industrial, medical, and communications markets. Comparable product portfolio and customer overlap with PRBX in demanding applications, with broader global scale.
• Murata Power Solutions: Murata Power Solutions, a division of Murata Manufacturing, produces DC/DC converters, AC/DC power supplies, and digital panel meters for industrial, railway, and medical applications. A larger, broad-line peer with overlapping vertical specialization and product portfolio.
• Mean Well: Mean Well is one of the largest global manufacturers of standard power supplies, particularly strong in LED drivers and industrial DIN-rail supplies. Represents a price-competitive incumbent in standard products that overlap with PRBX's catalog offerings.
• TDK-Lambda: TDK-Lambda is a division of TDK Corporation and one of the world's largest manufacturers of standard and custom power supplies, serving industrial, medical, defense, and railway markets. Directly overlaps with PRBX across nearly all verticals but operates at significantly greater scale globally.

Emerging players

• Mornsun Power: Mornsun is a Chinese manufacturer of AC/DC and DC/DC converters with growing presence in industrial, railway, and renewable energy applications. An emerging competitor to PRBX in cost-sensitive standard products, with comparable technology breadth.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubevimeo.com/prbx
• LinkedInlinkedin.com/company/2201242

Compliance21 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Powerbox International AB