RG303 Low Loss MIL-DTL-17 Compliant Cable 50 Ohm Coaxial Cable with PTFE Dielectric
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
| Item | Material | Diameters (mm) |
|---|---|---|
| Inner Conductor | SCCS | 1/0.94 |
| Insulation | PTFE | 2.95 |
| Outer Conductor | 1:SC | 3.53 |
| Jacket | FEP | 4.32 |
| Capacitance (pF/m) | 96.5 |
|---|---|
| Impedance (Ohms) | 50 |
| Velocity of Propagation (%) | 69.5 |
| Max Voltage (Vrms) | 1900 |
| Max Frequency (MHz) | 3000 |
| Bend Radius (mm) | 20 |
| Temperature Range (℃) | -55~+200 |
| Frequency (MHz) | Attenuation (dB/m) |
|---|---|
| 100 | 0.125 |
| 400 | 0.256 |
| 1000 | 0.420 |
| 3000 | 0.781 |
- 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.
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