What are RG62 Coaxial Cables?

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- everything RF

Jan 16, 2023

RG-62 Coaxial Cables are a type of cable that has been designed for carrying high frequency electromagnetic signals over long distances, owing to its high degree of signal integrity and lower signal loss.


The RG-62/A/B/U is a 93-ohm coaxial cable with an overall diameter of 0.242 inches and a voltage rating of up to 750 Vrms. It has an inner copper weld wire (CW) or copper-clad steel (CCS) wire (carrying the electrical signal) with 7 x 32 stranding construction. The inner conductor is enclosed by an insulation layer made of air space Polyethylene (ASP). The insulation layer is then completely enclosed by 1 bare 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 Polyvinyl Chloride (PVC). The jacket protects the cable core from mechanical, moisture, and chemical issues.

The RG-62/A/B/U cable exhibits capacitance of approximately 14.0 pF/ft (46.05 pF/m), signal attenuation of around 8 dB/100 ft at 400 MHz (signal attenuation of the cable depending on the frequency) and has a velocity of propagation of 84%. It has a center conductor measuring 0.0240 inches (0.612 mm) in diameter and an insulation layer measuring 0.146 inches (3.71 mm) in diameter.

Key Specifications of RG-62/A/B/U Coaxial Cables


Typical Value

Overall Diameter (inch)


Characteristic Impedance (Zo)

93 ohms

Maximum Voltage Rating (RMS)

750 V

Cable Capacitance (pF/ft)


Inductance (nH/ft)


Attenuation (dB/100 ft, @ 400 MHz)



Air Space Polyethylene (ASP)

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