LMR-400 Coax Cable has an ultraviolet-resistant polyethylene outer jacket with a service life of up to 20 years outdoors. The cable uses foam polyethylene dielectric insulation. It has a double shield that provides greater than 90 decibels of radio frequency (RF) shielding, comparable with the shielding achievable with semi-rigid coaxial cabling. You can use this cable for communications frequencies up to 5.8 GHz and losses at that frequency are 10.8 dB per 100 feet. Different versions include waterproof cable, non-halogen (no smoke) variants, and one with a low-cost PVC outer jacket. LMR is a registered trademark of Times Microwave Systems, which manufactures LMR series coaxial cables. Contact us to learn more about using Times Microwave LMR coaxial cables.
6 items
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$0.00 / 1000 FT
- Application: Outdoor
- Approx LBS/MFT: 68.00
- Cond. Material: Bare Copper Clad Aluminum
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$0.00 / 1000 FT
- Application: Indoor/Outdoor Riser CMR
- Approx LBS/MFT: 68.00
- Cond. Material: Bare Copper Clad Aluminum
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$0.00 /
- Application: Indoor/Outdoor Riser CMR
- Approx LBS/MFT: 68.00
- Cond. Material: Bare Copper Clad Aluminum
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$0.00 / 1000 FT
- Application: Low Smoke Zero Halogen
- Approx LBS/MFT: 68.00
- Cond. Material: Bare Copper Clad Aluminum
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$0.00 / 1000 FT
- Application: General Purpose
- Approx LBS/MFT: 68.00
- Cond. Material: Bare Copper Clad Aluminum
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$0.00 / 1000 FT
- Application: General Purpose
- Approx LBS/MFT: 68.00
- Cond. Material: Bare Copper Clad Aluminum
Additional Information
What is LMR-400 Coax Cable?
LMR cable is a low-loss coaxial cable manufactured by Times Microwave Systems. The primary feature of this cable is its low losses, especially at high frequencies. LMR400 50-ohm coaxial cable is relatively heavy, with an outside diameter of 0.4 inches. While flexible, it has a maximum recommended bend radius of 1 inch in fixed installations and 4 inches when the cable is unsecured.
LMR-400 Cable Construction
Solid Bare Copper Clad Aluminum Conductor
LMR-400 coax cable has a solid bare copper clad aluminum conductor with a diameter of 0.108 inches.
Foamed Polyethylene Dielectric Insulation
LMR-400 low loss coax cables use a foamed polyethylene dielectric with a nominal outer diameter of 0.285 inches.
Dual Shield
The cable has a dual shield. The inner shield, which acts as the return conductor, is aluminum tape. A tinned copper outer braid protects the aluminum tape and improves shielding.
LMR-400 Jacket Options
The standard jacket is a UV-resistant polyethylene jacket with a rated outdoor life of 20 years. Waterproof versions incorporate a sealing compound under the jacket. You can specify a PVC jacket and flame-resistant jackets.
What are suitable applications for LMR-400 cable?
This low loss cable cable is a direct replacement for RG8 coaxial cable. It's used for direct wireless transmission and as antenna feeds in the 5.8 GHz band including GPS, wireless local area network (WLAN), wireless internet, and microwave communications.
What are alternative 50-Ohm Coax Cables to LMR-400?
50-Ohm coax cables that are similar to LMR-400 cables are RG174, RG142, and RG58 coaxial cables.
Comparison between LMR-400 coaxial cable and other popular coax cables
| LMR-400 | RG8 | RG58 | RG213 | LMR-900 | |
|---|---|---|---|---|---|
| Impedance ohms | 50 | 52 | 53.5 | 50 | 50 |
| Attenuation 900MHz (dB/ft) |
3.9 | 4.1 | 13.0 | 8.2 | 1.7 |
| Attenuation 5.8 GHz | 10.8 | 40.9 | 51.6 | 28.6 | 4.9 |
| Maximum Voltage (DC) | 2500 | 4000 | 4000 | 2500 | 5000 |
| Diameter (in) | 0.405 | 0.405 | 0.405 | 0.405 | 0.870 |
LMR-400 Coaxial Cable Specs
| Central Conductor: | Solid bare copper clad aluminum |
| Dielectric: | Polyethylene foam |
| Outer Conductor and Shield: | Aluminum Tape |
| Outer Shield: | Tinned copper braid |
| Jacket: | Black polyethylene (waterproof, nonsmoking, and PVC alternatives) |
| Nominal Impedance: | 50 ohms |
| Nominal Capacitance: | 23.9 pf/ft |
| Operating Temperature Range: | -40°C to 85°C |
| Maximum Voltage: | 2500V (DC) |
| Conductor Resistance: | Inner Conductor: 1.39 ohms/1000ft Outer Conductor: 1.65 ohms/1000ft |
| Velocity of Propagation: | 85% |
| Attenuation at 900 MHz: | 3.9 dB/100ft |
| Shielding Effectiveness: | >90 dB |
Want to learn more about LMR-400 coax cable and other coaxial cables? Contact Us or learn more by visiting Allied University: