RG-303 Cable

Description

RG-303 is a premium coaxial cable designed for 50 Ohm systems operating in demanding environments. Manufactured to comply with MIL-DTL-17 specifications, it is optimized for applications that require a balance between high-frequency signal integrity and extreme environmental resilience. The cable features a solid silver-plated copper-clad steel (SPCCS) center conductor, which provides the high tensile strength needed for vibration-heavy environments while maintaining the superior conductivity of silver at high frequencies.

The internal architecture consists of a high-stability PTFE (Teflon) dielectric, ensuring low signal loss and exceptional thermal stability. To protect against electromagnetic interference (EMI), the cable is equipped with a high-density silver-plated copper braided shield. Encased in a transparent or tinted brown FEP (Fluorinated Ethylene Propylene) jacket, RG-303 can operate safely in temperatures ranging from -55°C to +200°C. Its robust design makes it a superior choice over standard RG-58 variants for high-heat and high-performance mission-critical systems. It is typically terminated with SMA, N-Type, or TNC connectors.

Key Technical Advantages

• Extreme Temperature Resilience: The PTFE/FEP construction ensures consistent electrical performance in environments where standard PVC cables would melt or become brittle.

• Silver-Plated Performance: Silver plating on both the center conductor and the shield maximizes conductivity through the “skin effect” and provides long-term resistance to oxidation.

• High Tensile Strength: The copper-clad steel core allows the cable to withstand significant pulling force and mechanical stress during installation in complex airframes or industrial machinery.

• Exceptional Signal Stability: Optimized for stable performance across the GHz spectrum, providing low VSWR and predictable attenuation for sensitive RF circuits.

• Chemical and Fluid Immunity: The FEP jacket is inert to most oils, solvents, and chemicals, ensuring survivability in engine bays and industrial laboratories.

Key Features

• Cable Type: RG-303 / U (MIL-C-17).

• Impedance: 50 Ohm.

• Center Conductor: 20 AWG (Solid Silver-Plated Copper-Clad Steel).

• Shielding: Single Silver-Plated Copper Braid (95% coverage).

• Dielectric: PTFE (Teflon).

• Common Applications: Aircraft avionics, satellite ground stations, high-temperature industrial sensors, and military communication links.

Technical Summary