DC Power Line Filters

FD Series DC Power Line Filter

Power Line Filters

Curtis Industries has been a leading manufacturer of top of the line custom electrical components for over 70 years. Our RFI filters are available in a wide variety of styles like medical, single phase, DC, three phase and medical. Every power line filter we manufacture is designed to ensure your electrical equipment meets the FCC and CE requirements for conducted EMI.

RFI Filters for Direct Current Appliances

Our general purpose FD series RFI filters are designed for direct current, or DC, applications. We manufacture three different types of DC power line filters including FD, FD0 and FD02 series. The FD series filters up to 300MHz.  FD0 series line dc power line filters are designed compact and are available from 6 amps to 100 amps. The FD02 series is a high frequency DC filter for 3GHz applications.

Every DC line filter complies with standards for UL/EN 60950 and UL 1459, CISPER 22 and Telecordia (Bellcore) GR-1089 at 25Amps and above. These power line filters are ideal for telecommunication and data communication markets. Our FD series DC filters are typically used in:

  • Modems
  • Switching Equipment
  • Network Routing Equipment
  • Base Stations
  • Ethernet Hubs
  • Power Supplies for Communications Equipment

Superior Electrical Components

We have been manufacturing the best custom electrical components on the market for over 70 years. Our experience, high quality materials and dedication to customer satisfaction ensures you will receive quality components for any industry. Electrical components manufactured by Curtis Industries is computer controlled quality tested to guarantee the part is dependable and meets the exact specifications required by regulatory agencies. Our dependable electrical components include power line filters, DIN rail blocks, terminal blocks, liquid level controls, PC board blocks, relay sockets and military grade filters.


  • Compact enclosure design
  • UL 60950 design includes operating voltages of -80 DC
  • Meets all NEBS requirements 40C continuous and 55C intermittent
  • Meets UL, cUL, and TUV specifications
  • Applications up to 100 amps
  • The FD Series is available in three designs, each with operating voltages of – 80 VDC and current ratings reaching 100 amps.

You can use double stud terminals, wire leads, or circuit breakers on the load and line sides.  The FD Series exceeds all NEBS requirements when performing in the 10 KHz to 30 MHz spectrum.