RG213/U is a 50 ohm coaxial cable for RF equipment and antenna interconnections where its frequency-loss characteristics suit the route. The centre conductor comprises seven plain copper wires, with low-density PE dielectric and a plain copper braid screen. PVC or LSZH outer sheath options are listed. This construction has a nominal overall diameter of 10.3 mm and is identified in the range as M17/74 - RG213 (RG213/U).
Inner conductor | Plain copper | 7 x 0.75 mm |
Dielectric | Low density PE | Φ7.25 ± 0.18 mm |
Outer conductor | Plain copper | 192 x 0.18 mm |
Shield coverage | 97% | |
Sheath | PVC or LSZH | Φ10.3 ± 0.18 mm |
| Impedance | 50±3 Ohm0 | |
| Nominal capacitance | 100pF/m | |
| Velocity of propagation | 66% | |
| Insulation resistance | >2000 Mohm.Km | |
| Inner conductor resistance | 6.0 Ohm/Km | |
Outer conductor resistance | 4.5 Ohm/Km | |
Test/Operatig Voltage(max) | 10KV/5KV | |
Operating temperature range | -30 °C - +70 °C | |
Copper Weight | 76.9 Kg/Km | |
Cable weight (approx.) | 163 Kg/Km | |
Screening effectiveness | 100-900 MHz | >55dB |
Frequency (MHz) | Attenuation (dB/100 m) | Attenuation (dB/100ft) |
| 50 | 4.5 | 1.37 |
100 | 6.7 | 2.04 |
200 | 9.9 | 3.02 |
400 | 14.3 | 4.36 |
500 | 16.1 | 4.91 |
600 | 17.8 | 5.43 |
860 | 22.1 | 6.74 |
1000 | 24.3 | 7.41 |
30-300 MHz | >31dB |
300-600 MHz | >28dB |
600-900 MHz | >27dB |
7 x 0.75 mm plain copper centre conductor.
Copper braid screen with 97% listed coverage.
50±3 ohm impedance with separate attenuation and return-loss data.
Calculate cable loss for the required length at the operating frequency and include connector losses in the system budget. Select the sheath for the installation environment and required fire-performance documentation. If procurement requires M17 qualification or a specific military specification, state the applicable document and evidence needed for the supplied cable.
RG213 Armoured Coaxial Cable, 50 Ohm, LSZH Marine Construction
RG58 Armoured Coaxial Cable, 50 Ohm, Tinned Copper and LSZH Sheath
What is the nominal impedance?
The cable is listed at 50 ohms with a tolerance of ±3 ohms.
Which conductor construction is used?
The centre conductor consists of seven plain copper wires, each 0.75 mm in diameter.
Is this the armoured marine version?
This page lists a copper braid screen and an outer sheath, without the additional bedding and braid armour of the related marine RG213 construction.
What attenuation is listed at 1000 MHz?
The table gives 24.3 dB per 100 m at 1000 MHz. Include connector and other component losses when assessing the complete route.
Which sheath details should accompany an order?
State PVC or LSZH, required length, installation exposure, connector arrangement and any project-specific test or qualification documentation.
