About RG-402 Cable

RG-402 Semi-Rigid coaxial cable is a MIL-DTL-17 qualified series providing mode free operation to 34 GHz. The sold tin-plated copper tube effectively provides 100% RF shielding with shielding effectiveness exceeding 110 dB, and enables the dielectric and center conductor to remain precisely spaced. This results in optimum impedance control as well as the lowest possible insertion loss and weight to size ratios.

It has become common practice to use the RG-402 designator when referring to the equivalent size conformable or flexible cable as opposed to the strict MIL-DTL-17 RG-402 i.e., Semi-Rigid, type. In the interest of minimising confusion it is not recommended to use this designator unless specifically requesting the MIL-DTL-17 semi-rigid cables.

0.141" cables such as RG-402 are medium sized and can be found in a range of ultra-high performance systems such as radio frequency test/laboratory/metrological equipment, electronic warfare applications, radar, and microwave radios.

As with all semi-rigid coaxial cables specialised tools must be used to form the cable into shape without damaging the wall of the outer tubing. Reforming a cable is difficult and often results in damage to the outer conductor, causing ripples in the outer wall that will affect the electrical performance of the cable assembly.

RG402 Semi Rigid coaxial cable layers
RF Performance
Operating Freq. Range 0 to 34.0 GHz Input Impedance
50 Ω
Velocity of Propagation
95.10 pF/m
Shielding Effectiveness
> 110 dB
Max. Operating Voltage
5.00 KVrms
Power Handling @ 1 GHz No Data
Physical Characteristics
Min. Bend Radius (Static)
12.50 mm
Weight No Data
Min. Bend Radius (Dynamic) No Data Operating Temperature -55 to 125 °C
LayerMaterialOuter Diameter
Inner Conductor
Silver Plated Copper Clad Steel (SCCS)
0.930 mm
Polytetrafluoroethylene (PTFE / Teflon)
3.000 mm
Outer Conductor
Copper Tube
3.580 mm