Quick Reference
RFC240 Coaxial Cable
50 Ohm • DC – 6 GHz
RFC-240 is a 0.240" 50-ohm low-loss coaxial cable delivering performance comparable to LMR-240 at a more accessible price, making it popular for installers who need reliable medium-distance cable runs. Well suited for cellular repeater installations, point-to-point wireless links, and access point feedlines up to 75 feet.
RFC240 Attenuation
Signal loss in dB per 100 ft at standard RF frequencies.
| Frequency | Loss / 100 ft | Loss / ft | 6 ft | 25 ft | 50 ft | 100 ft |
|---|---|---|---|---|---|---|
| 100 MHz | 2.5 dB | 0.025 dB | 0.15 dB | 0.63 dB | 1.25 dB | 2.5 dB |
| 450 MHz | 5.4 dB | 0.054 dB | 0.32 dB | 1.35 dB | 2.7 dB | 5.4 dB |
| 900 MHz | 7.8 dB | 0.078 dB | 0.47 dB | 1.95 dB | 3.9 dB | 7.8 dB |
| 1.8 GHz | 11.3 dB | 0.113 dB | 0.68 dB | 2.83 dB | 5.65 dB | 11.3 dB |
| 2.4 GHz | 13.1 dB | 0.131 dB | 0.79 dB | 3.28 dB | 6.55 dB | 13.1 dB |
| 5.8 GHz | 21.5 dB | 0.215 dB | 1.29 dB | 5.38 dB | 10.75 dB | 21.5 dB |
RFC240 Power Handling
Approximate maximum continuous power (CW) at 25°C ambient.
| Frequency | Max Power (W) |
|---|---|
| 100 MHz | 190 W |
| 450 MHz | 85 W |
| 900 MHz | 55 W |
| 1.8 GHz | 37 W |
| 2.4 GHz | 31 W |
| 5.8 GHz | 17 W |
Construction & Materials
Center Conductor
Bare copper clad aluminum, 1.42mm
The center conductor carries the RF signal. Material and diameter affect DC resistance, skin effect losses, and overall attenuation.
Dielectric
Foamed PE
The dielectric insulator separates the center conductor from the shield. PTFE dielectrics offer superior temperature stability and lower loss versus polyethylene.
Shield
Aluminum foil + tinned copper braid
The outer conductor provides the return path and shields the signal from external interference. More braid coverage means better EMI rejection.
Jacket
PE
The outer jacket protects the cable from physical damage, UV, chemicals, and moisture. PTFE and FEP jackets handle higher temperatures than PVC.
Velocity Factor
83% (c)
How fast the signal travels relative to the speed of light in vacuum. Higher velocity factor means shorter electrical wavelength per foot — important for phased array and delay-matched applications.
Max Voltage
600 VRMS
The maximum continuous operating voltage. Exceeding this can cause dielectric breakdown. Relevant for high-power transmitters and pulse applications.
Available RFC240 Assemblies
Choose a connector combination to see pricing and order. All assemblies are hand-built and ship free within the USA.
SMA MALE to SMA MALE
From $10.99
SMA FEMALE to SMA MALE
From $10.99
RP-SMA MALE to SMA MALE
From $10.99
RP-SMA FEMALE to SMA MALE
From $10.99
N MALE to SMA MALE
From $11.49
N FEMALE to SMA MALE
From $11.49
BNC MALE to SMA MALE
From $11.99
RP-TNC MALE to SMA MALE
From $10.99
SMA MALE to TNC MALE
From $10.99
PL259 UHF Male to SMA MALE
From $12.99
SMA MALE to SO239 UHF Female
From $12.99
SMA FEMALE to SMA FEMALE
From $10.99
RP-SMA MALE to SMA FEMALE
From $10.99
RP-SMA FEMALE to SMA FEMALE
From $10.99
N MALE to SMA FEMALE
From $11.49
N FEMALE to SMA FEMALE
From $11.49
BNC MALE to SMA FEMALE
From $11.99
RP-TNC MALE to SMA FEMALE
From $10.99
48 more configurations available on the RFC240 page.
Frequently Asked Questions
What is the impedance of RFC240?
RFC240 is a 50 Ohm coaxial cable. All standard RF systems (antennas, transceivers, test equipment) use 50-ohm impedance, so RFC240 connects directly without any matching network.
What frequency range does RFC240 support?
RFC240 is rated DC – 6 GHz. At higher frequencies, the attenuation per foot increases, so actual usable range depends on acceptable signal loss for your application.
How much signal loss does RFC240 have?
RFC240 has 2.5 dB of attenuation per 100 ft at 100 MHz, rising to 21.5 dB per 100 ft at 5.8 GHz. Use the attenuation table above to calculate loss for any specific length and frequency.
Are CoaxRF RFC240 cable assemblies made in the USA?
Yes. Every RFC240 assembly is hand-terminated and continuity tested at our US facility. We build each cable to order — nothing is pre-made or drop-shipped from overseas.
Can I order a custom length of RFC240?
Yes. In addition to our standard lengths (1, 6, 25, 50, 100 ft and longer), we accept custom-length orders through the Cable Builder. Custom assemblies ship within 1–2 business days.