RG400 Cable | High Frequency Coax with Solid Dielectric & FEP Jacket

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RG400 Coax Cable

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RG400 Coaxial Cable

What is RG400 Cable?

The RG400 is a high temperature coax cable used in a vast array of military and commercial applications. With a high temperature maximum of 200°C, in line with other coax cables like the RG142 Cable, this allows installation in heat sensitive environments.

Use in the military

The United States Military uses the M17/128-RG400, a military part number equivalent to the RG400 Cable. The testing of the RG400 and other military coax cables are very rigorous and the specifications even more so. The RG 400 manufacturers are required to test attenuation and structural return loss by sweeping 22 different 50-ohm cables over the frequency band for which their use is recommended. Among other tests for dimensional stability you can see why the RG400 cable is of high quality for tactical operations and aerospace technology

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Part Number	Conductor Stranding	Nom. O.D. (in)	Nom. Dia. of Cond.	Nom. Imp.	Dielectric (in)	Nom. Cap. (pF/ft)	Approx LBS/MFT
RG400	19/.008	0.1950	0.0384	50	0.116	29.4	50.00

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RG-400 Specs

Electrical Specifications

Impedance: 50 +/-2 (ohms)
Capacitance: 29.4 (pF/ft)
Maximum Voltage: 1900 (vms)
Maximum Frequency: 12.4 GHz
Minimum Temperature: -55°C
Maximum Temperature : 200°C
Mil-Spec Equivalent : M17/128-RG400 Cable
Bend Radius : 1.0"
Weight : 50 lbs/mft

RG 400 Cable Construction

Conductor (Inner Conductor): Silver Covered Copper
Dielectric: Solid Polytetrafluoroethylene (PTFE)
Shield (Outer Conductor): Double Silver Covered Copper Shields
Jacket: Flourinated Ethylene Propylene (FEP) Type IX per MIL-C-17

RG400 Diameter

Center Conductor: 0.0384" (19/.008")
Dielectric Diameter: 0.116"
Shield Diameter: 0.156"
Overall Diameter: 0.195"

RG400 Loss (Attenuation) & Power Handling

Freq. (MHz)	Typical	Max
100	4.1	4.5 dB/100ft.
400	8.6	10.5 dB/100ft.
1000	14.2	18.1 dB/100ft.
2400	23.6	30.2 dB/100ft.
5000	37.0	52.1 dB/100ft.
10000	57.8	78.0 dB/100ft.

RG400 Datasheet

If you're in sales, customer service, or need to show a client, we offer the ability to download a printable spec sheet of the RG400 coaxial cable. Download the RG400 Datasheet PDF.

RG400 Video

RG400 Applications:

The RG400 cable is extensively and reliably used in the following types of projects:

Radio frequency
Telecommunications Applications
Radio Systems
Test Cables
Signal Transfer Applications
Interconnects

RG400 Cable is also approved for direct burial. Whether it's being used in an in-flight entertainment system or a telecommunications application it is a very versatile coax cable to use commercially and militarily.

Per specification, RG400 coax cable will have splices. If continuous lengths are needed, please alert your Allied Wire & Cable Representative.