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Allied University
ptfecoaxial

What is PTFE?

Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer most commonly known for its use in the non-stick coating on cookware. In the wire and cable industry, PTFE is used as insulation and jacketing for numerous cables.

What are the benefits of using PTFE with Coaxial Cables?

PTFE is very non-reactive and has a low dielectric constant rating, especially at high frequencies. The dielectric rating is the term used to define the energy storing capacity of the insulation material, This makes it popular for use with coaxial cables since it won't hold as much electrostatic charge as other insulation materials.

Which Coaxial Cables use PTFE?

Several types of coaxial cables use PTFE as the dielectric/insulation, the jacket, or both. Here are the PTFE coaxial cables that Allied Wire and Cable carries:

  • RG142 Cable: This coaxial cable is constructed of a silver-coated copper-clad steel conductor, PTFE dielectric, 2 silver-coated copper shields, and a fiberglass jacket. It is rated to 1,900 VMS, has an operating temperature range of -55° Celsius and 250° Celsius, and is typically used for interconnects or jumpers.
  • RG178 Cable: This coaxial cable is constructed of a silver-coated copper-clad steel conductor, PTFE dielectric, a single silver-coated copper shield, and a fluorinated ethylene propylene jacket. It is rated to 1,000 VMS and has an operating temperature range of -55° Celsius to 200° Celsius.
  • RG179 Cable: This coaxial cable is constructed of a silver-coated copper-clad steel conductor, PTFE dielectric, a single silver-coated copper shield, and a KEL-F jacket. It is rated to 75 ohms and is suited for use with cable TV and video.
  • RG180 Cable: This coaxial cable is constructed of the same materials as the RG179 cable, but is rated at 95 ohms and has 15 pF/ft capacitance. This makes it more suitable for data transmission over cable TV and video.
  • RG188 Cable: This coaxial cable is constructed of a silver-coated copper-clad steel conductor, a PTFE jacket and insulation, and a single silver-coated copper shield. It is rated to 1,200 VMS and has a temperature range of -55° Celsius to 250° Celsius.
  • RG316 Cable: This coaxial cable is constructed of a silver-coated copper-clad steel conductor, a single silver-coated copper shield, a solid PTFE dielectric, and a fluorinated ethylene propylene (FEP) jacket. It is rated to 1,200 VMS and should only operate between -55° Celsius and 80° Celsius.
  • RG400 Cable: his coaxial cable is constructed of a silver-coated copper-clad steel conductor, a dual shield, solid PTFE dielectric, and a fluorinated ethylene propylene (FEP) jacket. It is rated to 1,900 VMS and has a temperature range of -55° Celsius to 200° Celsius.

What are the Mil-spec equivalents for these cables?

RG142 Coax – M17/60-RG142
RG178 Coax – M17/93-RG178
RG179 Coax – M17/94-RG179
RG180 Coax – M17/95-RG180
RG214 Coax – M17/75-RG214
RG223 Coax – M17/84-RG223
RG316 Coax – M17/113-RG316
RG400 Coax – M17/128-RG400

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