L-240, sometimes referred to as LMR-240, is a low loss coaxial cable with a medium sized 6.10 mm outer diameter. This series is without a doubt the most popular choice of RF cable, due to its efficient compromise between performance and cost. 

L-240 cable provides the flexibility and easy installation of a smaller diameter cable, with the low attenuation and shielding advantages of a larger cable. Unlike larger cables, L-240 can pass 5G and mmWave frequencies up to 31 GHz.

The cable is a mid-size with an overall diameter of 6.10 mm, providing a compromise between form-factor/bend radius, and attenuation/power handling. The double shielded outer conductor provides exceptional RF shielding exceeding 90 dB, and PE jacket for a service life in excess of 20 years.

Terminating L-240 coaxial connectors requires a 6.48 mm (.255") hex die.

LMR-240 coaxial cable layers

RF Specification

Min. Frequency
0 GHz
Max. Frequency
31 GHz
Shielding Effectiveness
> 90 dB
Capacitance
79.4 pF/m
Impedance
50 Ω
Velocity
84%
RF Operating Voltage
5000 Vrms

Frequency Test Data

Frequency Attenuation
1000 MHz
0.26 dB/m

Physical Specification

Colour
Black
Min. Bend Radius Static
19.1 mm
Min. Bend Radius Dynamic
63.5 mm
Min. Operating Temperature
-40 °C
Max. Operating Temperature
85 °C
Weight (g/m)
50 g

Cable Layers

Layer Diameter Materials
Inner Conductor
1.42 mm
Dielectric
3.81 mm
Outer Conductor
3.94 mm
Outer Conductor
4.52 mm
Outer Jacket
6.10 mm

Manufacturer Variations

Illustration Manufacturer Series Description
Powertec PTL-240 Coaxial Cable
Powertec PTL-240

Powertec’s PTL-240 is an L-240 class low loss coaxial cable with a 6.1 mm outer diameter. Supporting frequencies beyond 6 GHz, it is a popular choice of RF cable, due to its efficient compromise between performance and cost.

PTL-240 cable provides the flexibility and easy installation of a smaller ...