DEDICATED TO TELECOM, BACKED BY A POWER SOLUTIONS LEADER

Harmer & Simmons leverages its extensive resources and know-how to deliver power supplies and converters designed to meet the special needs of telecom clients
Harmer & Simmons consolidates the former telecom portfolios of Saft Power Systems and AEG telecom under a single banner. Building on eight decades of expertise and innovation, Harmer & Simmons is the Telecom division of AEG Power Solutions.
 
Reduce your operating costs with Harmer & Simmons modular AC and DC power supply systems
 
Harmer & Simmons provides a comprehensive range of power systems designed to meet the needs of fixed line and wireless telecom operators, internet service providers and CATV operators as well as telecom equipment manufacturers and industrial applications.
  • Extremely high power density
  • Redundancy
  • Space saving
  • Simple maintenance
  • Low cost of ownership
Find the best power conversion solution for your specific requirements
 
Harmer & Simmons converters, which range from 10W to 700W, support virtually all commonly used system architectures -- centralized, distributed and fault AC/DC tolerant redundant. In addition to our standard range, Harmer & Simmons’ custom design power converters help you meet your most demanding specific power conversion challenges.
  • High efficiency
  • Industry standard footprint
  • Open frame or cased
  • No heat sink below 50W
  • Synchronous rectification

More than eight decades of innovation

Founded in the United Kingdom in 1927 as a supplier of mobile amplifiers and sound systems, Harmer & Simmons became widely recognized as a leading pioneer in telecom power supplies during the 1930s. Since that time, the company has brought to market a constant stream of innovative power supply and power conversion solutions.

World-class engineering

A full commitment to engineering excellence: 
  • 250 engineers and project managers
  • R&D and application engineering: 8% of revenues
World-renowned for our ability to develop high quality, high reliability solutions tailored to specific customer needs, our unique resources benefit also of the competence centers of our mother company: AEG Power Solutions group, in France (Tours), and of newly dedicated centers as Penang (Malaysia) or Bangalore (India). For Power supplies, it includes the experienced Harmer & Simmons engineering team based in Lannion, France, which devotes some 40% of its activity to research and development.
Serving the world’s telecom leaders
 
Our long-list of satisfied customers includes many of the world’s leading telecom and CATV operators, internet service providers and telecom equipment manufacturers, including:
  • Alcatel-Lucent
  • K Mobile (Kazakhstan)
  • KPN (Netherlands)
  • MTC (Russia)
  • Orange (France, Romania, Thailand, UK)
  • SFR (France)
  • Vodafone (Albania, Greece, France, Portugal)
  • Wind (Italy) ...