Power Conversion for Heavy Rail

Subway Train
Railroad Tracks
Subway Train

Schaefer specializes in solutions for on-board and trackside heavy rail applications. Our unique design and manufacturing allows flexibility in power conversion for an endless combination of input and output voltages. Extra rugged construction ensures long-life, reliable operation in even the most demanding applications, including on-board electronics, as well as other transit vehicles, mining vehicles, and switches.

Schaefer's Product Features

  • 36VDC, 37.5VDC, 74VDC or 110VDC
  • Ultra-wide input ranges to handle extremes, such as the 74VDC bus.
  • Steady output power even during start-up or cranking conditions
  • Buck, boost, or isolated topology
  • DC/DC, DC/AC, AC/DC or AC/AC
  • Custom solutions, typically with no NRE
  • High efficiency for lower cost of ownership
  • Hermetically sealed solutions
  • Natural convection or water-cooled solutions
  • Extra rugged construction for use in the most demanding and harsh trackside and on-board environments
  • Redundant configurations for longer life operation in critical applications
  • Ultra-wide temperature ranges
  • Lightweight, high power density for smaller package designs

Schaefer Capabilities for Heavy Rail

DC/AC Three-Phase Inverter System for Motor Drive

DC/AC Three-Phase Inverter System for Motor Drive

DC/AC Inverter Systems are designed with the application of modern technology resulting in compact machines for motor drives. Besides offering reliability and high performance, which will guarantee long operating periods without requiring any maintenance, SCHAEFER solutions present outstanding operating features. Learn More


On-board power system

On-board Power System

For any system that depends on sophisticated electronics, everything begins with the power supply. Our shared objectives are to provide a safe and accessible power supply solution for on-board power systems. This battery charger system has been designed to operate efficiently and effectively giving maximum reliability to the on-board power systems eliminating unplanned stops and failures and a longer lifetime. Learn More


4.0kW on-board battery charging system

4.0kW On-board Battery Charging System

Maintaining the United States’ rail power infrastructure demands cutting-edge engineering, something US Power Networks Services have consistently demonstrated through long-term projects with partners like SCHAEFER. There are considerable challenges in ensuring a stable power supply system to the railway as there are not only strict technical and performance requirements but also the need to conform to several international standards. Learn More