RG400 Coax M17/128 50 Ohm Double Shielded 12.4 GHz RG Cable for Aerospace and Defense

RG400 M17/128 is a MIL-DTL-17 qualified 50 Ohm double shielded coaxial cable engineered for demanding aerospace, defense, and high reliability applications. This high temperature RF cable features a 19-strand silver-plated copper center conductor and PTFE dielectric, delivering exceptional electrical performance up to 12.4 GHz. The dual silver-plated copper braid shields provide superior EMI/RFI protection, while the FEP jacket offers excellent chemical resistance and thermal stability. With continuous operation from -55°C to +200°C, RG400 is the preferred choice for defence aircraft, missile systems, radar installations, and test equipment where performance under extreme conditions is non-negotiable.

• Double silver braid shielding – Dual silver-plated copper braids deliver exceptional EMI/RFI rejection for sensitive electronics
• Silver-plated copper conductor – High strand count provides excellent flexibility and fatigue resistance for vibration-prone applications
• 12.4 GHz frequency capability – Broadband performance for demanding RF and microwave systems
• PTFE dielectric – Superior thermal stability and low loss from -55°C to +200°C
• FEP jacket – Chemical resistant, UV stable, and low smoke for harsh environments
• MIL-DTL-17 qualified – M17/128 for mission-critical defense and aerospace applications
• NSN 6145-01-512-1911 – Federal stock number assigned for government procurement
• 4.95mm diameter – Compact yet rugged construction for space-constrained installations
• Excellent flexibility – 19-strand conductor allows repeated flexing without fatigue failure

• Aircraft engine compartments – Withstands constant vibration and temperature extremes in nacelle and pylon wiring
• Missile guidance sections – Survives launch shock and high-G maneuvering without signal degradation
• Rotary wing platforms – Helicopter vibrations demand the 19-strand flex life that RG400 provides
• Electronic warfare pods – Dual shielding protects sensitive receivers in high-density jamming environments
• Shipboard radar rooms – Resists salt fog and maintains performance in confined spaces
• Satellite payload harnesses – PTFE construction prevents outgassing and maintains performance in vacuum
• Test cell instrumentation – Repeated flexing during setup requires cables that don't fail after dozens of test cycles
• Mobile tactical vehicles – Withstands washdown, fuel exposure, and rough terrain vibrations
• Medical RF ablation – Flexible leads for cath lab equipment requiring sterilization cycles
• Drone avionics – Lightweight construction with vibration resistance for unmanned platforms

Q: What application demands the 19-strand construction of RG400?
A: Any platform with sustained vibration—helicopters, turbine engines, missile launchers, or test cells—benefits from the flex fatigue resistance that 19 strands provide over fewer strands or solid conductors.

Q: What makes RG400 different from RG142?
A: RG400 uses a 19-strand silver-plated copper conductor for maximum flex life, while RG142 employs a solid SCCS conductor for maximum tensile strength. Choose RG400 for vibration, RG142 for pulling tension.

Q: Can RG400 replace RG316 in existing designs?
A: No, RG400 has a 4.95mm diameter versus RG316's 2.49mm, requiring different connector sizes. It's a higher power, more rugged alternative for new designs or upgrades.

Q: What chemicals does the FEP jacket resist?
A: FEP withstands jet fuel (JP-8), hydraulic fluids (Skydrol), lubricating oils, de-icing fluids, and most industrial solvents—critical for aircraft and tactical vehicle applications.

Q: Is this cable suitable for cryogenic temperatures?
A: While rated to -55°C, PTFE maintains flexibility to lower temperatures. For cryogenic applications below -100°C, consult our engineering team for specialized variants.

Q: What is the expected flex life?
A: In standardized flex testing, the 19-strand construction typically achieves 10x more cycles before failure compared to 7-strand designs used in standard RG cables.

Q: Do you offer custom lengths?
A: Yes, we are a RF coax cable manufacturer, accept OEM & ODM, RG400 is available by the meter or foot with no minimum. Cut lengths are individually packaged with heat-sealed ends to prevent moisture ingress.