LMR®-300
Flexible Low Loss Communications Coax
Ideal for…
• Jumper Assemblies in Wireless Communications Systems
• Short Antenna Feeder runs
• Any application (e.g. WLL, GPS, LMR, WLAN, WISP, WiMax, SCADA, Mobile Antennas) requiring an easily routed, low loss RF cable
• LMR® standard is a UV Resistant Polyethylene jacketed cable designed for 20-year service outdoor use. The bending and handling characteristics are significantly better than air-dielectric and corrugated hard-line cables.
• LMR®- DB is identical to standard LMR plus has the advantage of being watertight. The addition of waterproofing compound in and around the foil/braid insures continuous reliable service should the jacket be inadvertently damaged during installation or in the future.
• LMR®- FR is a non-halogen (non-toxic), low smoke, fire retardant cable designed for in-building runs that can be routed anywhere except air handling plenums. LMR-FR is UL/NEC & CSA rated ‘CMR’ and ‘FT4’ respectively, meets FAA FAR25 requirements and is MSHA-P for mining applications.
• LMR®- FR-PVC is a general-purpose indoor cable and has a UL/NEC & CSA rating of ‘CMR’ and ‘FT4’ respectively. It is less expensive than LMR-FR, however it emits toxic fumes (HCL) and greater smoke density when burned.
• LMR®- PVC is designed for low loss general-purpose applications and is somewhat more flexible than the standard polyethylene jacketed LMR.
• LMR®- PVC-W is a white-jacketed version of LMR-PVC for marine and other applications where color compatibility is desired.
Part Description
| Stock Code |
Part No. |
Application |
Jacket |
Colour |
| 54086 |
LMR-300 |
Outdoor |
PE |
Black |
| 54114 |
MR-300-DB |
Outdoor/Watertight |
PE |
Black |
| 54087 |
MR-300-FR |
Indoor/Outdoor Riser CMR |
FRPE |
Black |
| 54108 |
MR-300-FR-PVC |
Indoor/Outdoor Riser CMR |
FRPVC |
Black |
| 54217 |
MR-300-PVC |
General Purpose |
PVC |
Black |
| 54203 |
MR-300-PVC-W |
General Purpose |
PVC |
White |
• Flexibility and bendability are hallmarks of the LMR-300 cable design. The flexible outer conductor enables the tightest bend radius available for any cable of similar size and performance.
• Low Loss is another hallmark feature of LMR-300. Size for size LMR has the lowest loss of any flexible cable and comparable loss to semirigid hard-line cables.
• RF Shielding is 50 dB greater than typical single shielded coax (40 dB). The multi-ply bonded foil outer conductor is rated conservatively at > 90 dB (i.e. >180 dB between two adjacent cables).
• Weatherability: LMR-300 cables designed for outdoor exposure incorporate the best materials for UV resistance and have life expectancy in excess of 20 years.
• Connectors: A wide variety of connectors are available for LMR-300 cable, including all common interface types, reverse polarity, and a choice of solder or non-solder center pins. Most LMR connectors employ crimp outer attachment using standard hex crimp sizes.
• Cable Assemblies: All LMR-300 cable types are available as pre-terminated cable assemblies.
Construction Specifications
| Description |
Material |
In. |
(mm) |
| Inner Conductor |
Solid BC |
0.070 |
(1.78) |
| Dielectric |
Foam PE |
0.019 |
(4.83) |
| Outer Conductor |
Aluminum Tape |
0.096 |
(4.98) |
| Overall Braid |
Tinned Copper |
0.225 |
(5.72) |
| Jacket |
(see table above) |
0.300 |
(7.62) |
Mechanical Specifications
| Performance Property |
Units |
US |
(metric) |
| Bend Radius: installation |
in. (mm) |
0.88 |
(22.2) |
| Bend Radius: repeated |
in. (mm) |
3.0 |
(76.2) |
| Bending Moment |
ft-lb (N-m) |
0.38 |
(0.52) |
| Weight |
lb/ft (kg/m) |
0.055 |
(0.08) |
| Tensile Strength |
lb (kg) |
120 |
(54.5) |
| Flat Plate Crush |
lb/in. (kg/mm) |
30 |
(0.54)
|
Environmental Specifications
| Performance Property |
°F |
°C
|
| Installation Temperature Range |
-40/+185 |
-40/+85 |
| Storage Temperature Range |
-94/+185 |
-70/+85 |
| Operating Temperature Range |
-40/+185 |
-40/+85 |
Electrical Specifications
| Performance Property |
Units |
US |
(metric) |
| Velocity of Propagation |
% |
85 |
| Dielectric Constant |
NA |
1.38 |
| Time Delay |
nS/ft (nS/m) |
1.20 |
(3.92) |
| Impedance |
ohms |
50 |
| Capacitance |
pF/ft (pF/m) |
23.9 |
(78.4) |
| Inductance |
uH/ft (uH/m) |
0.060 |
(0.20) |
| Shielding Effectiveness |
dB |
>90 |
| DC Resistance |
|
| Inner Conductor |
ohms/1000ft (/km) |
2.12 |
(7.0) |
| Outer Conductor |
ohms/1000ft (/km) |
2.21 |
(7.3) |
| Voltage Withstand |
Volts DC |
2000 |
| Jacket Spark |
Volts RMS |
5000 |
| Peak Power |
kW |
10 |
Brand: Times Microwave Systems
LMR® is a registered trademark of Times Microwave Systems
