BAE Systems HybriDrive

Schaefer, Inc.

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45 South Street
Hopkinton, MA 01748
About Schaefer, Inc.
  • Schaefer specializes in design and manufacture of highly rugged power supplies and power conversion systems used in applications requiring high reliability under severe ambient conditions.

    Schaefer’s complete line of state-of-the-art, high efficiency, wide temperature range power conversion products include: AC/DC & DC/DC Converters (50W – 40 kW+)
    DC/AC Inverters (200VA – 30 kVA)
    Battery chargers (150W – 40 kW+)
    Step-up Converters (50W – 22 kW).

    All products are designed to meet the needs of light & heavy rail applications. Custom and modified designs, tailored to the customer's specific requirements are easily handled, often with little or no NRE.
Competitors of Schaefer, Inc.
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Products by Schaefer, Inc.
  • Low Voltage Power Supply

    Schaefer's LVPS accepts a 37.5VDC input and can provide from 8kW to 40kW of total output power. Units operate over a wide temperature range and feature transient undervoltage and overvoltage protection. The LVPS works with existing or self-contained system cooling. AC/DC and DC/DC designs... Read more
  • MHVC250 Dead Start Converter

    The MHVC250 design features a wide input range of 420VDC to 975VDC which converts voltage from the third rail to 24VDC for supplying points, signal lamps and electronic monitoring. The MHVC250 can also be used as a self-starting module for trams or trolleys with discharged batteries, avoiding... Read more
  • C4800 AC/DC or Battery Charger

    5KW of power with ten standard DC input ranges, single or three phase AC inputs or battery charging models. Single DC output voltages up to 400VDC. Rugged 6U package! Read more