What is LMR-400-DB Cable?

The LMR-400-DB cable is a high-performance, 50-ohm coaxial cable engineered specifically for direct burial installations and harsh outdoor environments. It features a durable, UV-resistant polyethylene (PE) jacket and watertight construction, making it ideal for long-lasting antenna and RF connections that require strong protection from moisture and soil conditions.​

Key Features

• Robust watertight PE jacket for reliable direct burial applications​

• Double-shielded design for 90 dB RF interference protection​

• Low signal attenuation, excellent up to 8 GHz​

• Flexible with a minimum install bend radius as low as 1 inch​

• Operating temperature range from -40°C to 85°C​

• Outer diameter: 0.405 inches (10.29 mm)

LMR-400-DB Cable vs Standard RG Cables

The LMR-400-DB cable significantly surpasses standard RG cables such as RG-213 and RG-8 in terms of both RF shielding and signal attenuation, especially when used outdoors or in direct burial installations. Its watertight, UV-resistant jacket and double shielding provide robust performance and reliability, while standard RG cables are more susceptible to moisture, environmental wear, and higher signal loss.​

Applications and Benefits

• Outdoor antenna runs, direct burial installations, and wireless RF systems​

• Provides lasting protection and high signal integrity where cable exposure to moisture or soil is likely​

• Ensures low loss and high reliability compared to typical RG cable alternatives​

Choose LMR-400-DB cable for direct-burial or outdoor antenna projects where unsurpassed signal quality and cable durability are essential.