What are RG214 Coaxial Cables?

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- everything RF

Jan 23, 2023

RG214 Coaxial Cables are a type of cable that exhibits high degree of signal integrity and low signal loss. These cables are therefore ideal for long-haul communication links, telecommunications, and networking applications.


RG214/U Cable Construction

The RG214/U is a 50-ohm coaxial cable with an overall diameter of 0.425 inches and a voltage rating of up to 5000 Vrms. It has an internal silver covered copper conductor with 7-stranding construction (carrying the electrical signal), which is enclosed by an insulation layer made of Polyethylene (PE). The insulation layer is then completely enclosed by 2 silver covered copper braid shields that form 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 Polyvinyl Chloride (PVC). The jacket protects the cable core from mechanical, moisture, and chemical issues.

The RG214/U cable exhibits capacitance of approximately 30.8 pF/ft (101.3 pF/m), signal attenuation of around 5.5 dB/100 ft at 400 MHz (signal attenuation of the cable depending on the frequency), and has a velocity of propagation of 66%. It has a center 7-stranding conductor design measuring 0.0888 inches (2.25 mm) in diameter and an insulation layer measuring 0.285 inches (7.2 mm) in diameter. This cable is ideal for telecommunications, data transmission, radio frequency communication, broadcast, computer, instrumentation & control applications. It has an operating temperature of -40˚C to + 80˚C.

Key Specifications of RG214/U Coaxial Cables


Typical Value

Overall Diameter (inch)


Characteristic Impedance (Zo)

50 ohms

Maximum Voltage Rating (RMS)

5000 V

Cable Capacitance (pF/ft)


Nominal Inductance (nH/ft)


Attenuation (dB/100 ft , @ 400 MHz)



Polyethylene (PE)

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