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Polytron Devices Inc. has been a leading designer and supplier of standard and customisable DC-DC converters, switching power supplies and linear power modules for nearly 50 years. Founded in 1969 by David Metzger, Polytron Devices pioneered the development of linear power supplies and shipped many of the first units.


Polytron’s focus on customer support and attention to global technological trends has allowed them to grow exponentially and they now manufacture and distribute thousands of different products. Product offerings include universal input power supplies, one-half to 200 watt DC-DC converters and linear power supply modules available in open frame, enclosed and encapsulated formats.


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DSBH Series

  • 1W to 3W
  • 4:1 Wide Input Voltage Range 
  • Extra Small SMD or DIP Package
  • 3000Vdc Input to Output Isolation Available
  • No Minimum Load Required


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FWB Series

  • 150W to 200W
  • 4:1 Wide Input Range (9-36, 43-160Vdc) 
  • Industrial and Rail Industry
  • Adjustable Output Voltage
  • UL60950-1, EN60950-1 IEC60950-1, and EN50155 Approved


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HWB Series

  • 75W to 200W
  • Industry Standard Half Brick Footprint 
  • Adjustable Output Voltage
  • Safety Meets UL60950-1, EN60950-1 and EN50155
  • Terminal Block Optional


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IP Series

  • 15W to 24W
  • Medical External 
  • Interchangeable heads
  • DoE VI Compliance
  • Input and output connector options


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Linear Encapsulated Power Modules

  • 1W to 20W
  • Medical and Industrial 
  • Extra Low noise
  • Single, Dual and Triple Outputs
  • P.C. Card/Chassis Mounting


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With over 50 years designing, manufacturing and supplying power supplies for some of the most demanding applications, Gresham has a strong reputation for service and support.  We offer a wide range of both standard and custom power supplies with many items readily available from stock.


bsi. ISO9001 Quality Management

Headquarters: 48430 Lakeview Blvd. Fremont, CA 94538

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