RG303 is a MIL-DTL-17 qualified 50 Ohm coaxial cable (M17/111-RG303) engineered for applications where mechanical reliability is as critical as electrical performance. Built with a solid silver-coated copper-covered steel center conductor and silver-plated copper braid shield, this cable delivers the strength to withstand vibration, pulling stress, and harsh handling while maintaining clean signal transmission up to 3 GHz.

• Steel-reinforced strength – Solid SCCS conductor provides exceptional tensile durability compared to standard copper cables
• Mil-spec compliant – Manufactured to M17/111-RG303 specifications for consistent quality and reliability
• Wide temperature range – PTFE insulation and FEP jacket perform reliably from -55°C to +200°C
• High voltage handling – Rated for 1900 V RMS, suitable for demanding power requirements
• Proven attenuation – Predictable signal loss performance across frequencies up to 3 GHz

• Defense communication systems – Withstands rugged field use, M17/111-RG303 qualified
• Aerospace and avionics – Reliable under constant vibration and stress
• Antenna installations – Clean signal delivery with low attenuation up to 3 GHz
• Radar and defense electronics – Single shielding protects against interference
• Test and measurement – Stable impedance for accurate, repeatable results
• Shipboard and marine – Resists harsh environmental conditions
• Industrial high-vibration areas – Solid conductor prevents fatigue failure

Q: What is the difference between RG303 and RG316?
A: While both cables use SCCS conductors, RG303 features a larger solid conductor (1/0.94mm) and 4.32mm FEP jacket, designed for higher voltage handling (1900 VMS) and lower attenuation. RG316 is smaller (2.49mm) and more flexible for tight space installations.

Q: What is the M17 designation?
A: M17/111-RG303 is the official MIL-DTL-17 part number.

Q: What connectors work with this cable?
A: Connectors designed for 4.32mm jacketed cables, including appropriate SMA, BNC, TNC, and N-Type models.

Q: Can this cable be used in moving applications?
A: It is designed for stable installations with vibration, not continuous flexing. The solid conductor provides strength but is less flexible than stranded designs.

Q: Is outdoor use acceptable?
A: Yes, the FEP jacket provides UV and moisture resistance.

Q: Do you offer custom lengths?
A: Yes, we are a RF coaxial cable manufacturer, accept OEM & ODM, sold by meter/foot with no minimum. Assemblies with connectors available.