What are RG316 Coaxial Cables?

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- everything RF

Jan 30, 2023

RG316 Coaxial Cables are a type of cable commonly used for carrying high-frequency electromagnetic signals in telecommunications and networking systems. They are designed to transmit radio frequency (RF) signals over longer distances while ensuring minimal signal attenuation. These cables are therefore suitable for long-haul communication links and other wireless infrastructure applications where low signal cable loss is desirable.


RG316/U Cable Construction

The RG316/U is a 50-ohm coaxial cable with an overall diameter of 0.102 inches and a voltage rating of up to 1200 Vrms. It has an internal silver-covered copper-clad steel (SCCS) conductor with a 7-stranding construction (carrying the electrical signal), which is enclosed by an insulation layer made of Polytetrafluoroethylene (PTFE). The insulation layer is then completely enclosed by 1 silver-covered copper braid shield that forms the outer conductor and also provides shielding against electromagnetic interference (EMI). Finally, the structure is covered with an outermost layer - called a jacket - made of Fluorinated ethylene propylene (FEP-IX). The jacket protects the cable core from mechanical, moisture, and chemical issues.

The RG316/U cable exhibits a capacitance of approximately 29.4 pF/ft (96.5 pF/m) and signal attenuation of around 20.0 dB/100 ft at 400 MHz (signal attenuation of the cable depending on the frequency). It has a center 7-stranding conductor design measuring 0.0210 inches (0.533 mm) in diameter and an insulation layer measuring 0.060 inches (1.520 mm) in diameter. This cable is ideal for use in general purposes, antenna feeds, communication systems, wireless systems, indoor/outdoor use, high-temperature applications, and much more. It has an operating temperature of -55˚C to + 80˚C.

Key Specifications of RG316//U Coaxial Cables


Typical Value

Overall Diameter (inch)


Characteristic Impedance (Zo)

50 ohms

Maximum Voltage Rating (RMS)

1200 V

Cable Capacitance (pF/ft)


Attenuation (dB/100 ft, @ 400 MHz)



Polytetrafluoroethylene (PTFE)

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