L-500 is a heavy duty 50 Ω full sized coaxial cable with an overall diameter of 12.7 mm and finds its use as a general purpose feeder cable for SCADA, WiFi, UHF, and other telemetry systems, although less popular than their L-400 and L-600 counterparts. The double shielded outer conductor provides exceptional RF shielding exceeding 90 dB, and PE jacket for a service life in excess of 20 years.

L-500 coaxial cables are often referred to as LMR-500 cable, however LMR is an international trademark of Times Microwave. Each manufacturer will typically use a three letter prefix to reference their own similar variation, such as CNT-500 (for Commscope), KSR-500 (for KingSignal), and so forth.

LMR500 coaxial cable layers

RF Specification

Min. Frequency
0 GHz
Max. Frequency
12.6 GHz
Shielding Effectiveness
> 90 dB
Capacitance
77.4 pF/m
RF Operating Voltage
8000 Vrms
Impedance
50 Ω
Velocity
86%
Attenuation Table
Frequency Attenuation
1000 MHz
0.11 dB/m

Physical Specification

Colour
Black
Min. Bend Radius Static
31.8 mm
Min. Bend Radius Dynamic
127 mm
Min. Operating Temperature
-40 °C
Max. Operating Temperature
85 °C
Weight (g/m)
140 g
Cable Layers
Layer Diameter Materials
Inner Conductor
3.61 mm
Dielectric
9.40 mm
Outer Conductor
9.55 mm
Outer Conductor
10.29 mm
Outer Jacket
12.70 mm