RG178 cable

Cable

RG178

SMA FEMALE

End A

SMA FEMALE

$1.00

SMA MALE

End B

SMA MALE

$1.00

50 Ohm DC – 3 GHz

RG178 — SMA FEMALE to SMA MALE

Custom RG178 cable assembly with SMA FEMALE and SMA MALE connectors. Every cable is hand-assembled, tested, and ships free.

Length Price
1 ft $5.99
6 ft $8.49
25 ft $17.99
Need a different length? Use the Cable Builder

Specs Summary

CableRG178
Diameter1.75MM
Impedance50 Ohm
FrequencyDC – 3 GHz
Velocity Factor69%
SMA FEMALE InterfaceSMA threaded (MIL-STD-348)
SMA MALE InterfaceSMA threaded (MIL-STD-348)

About This Assembly

RG178 Cable

RG-178 is an extremely thin 50-ohm coaxial cable measuring just 1.75mm in diameter, designed for space-constrained RF assemblies. Its PTFE dielectric and silver-plated conductors deliver reliable performance from DC up to several GHz. Commonly used for internal wiring in test equipment, medical devices, and cellular module pigtails.

SMA Connector

SMA (SubMiniature version A) is the most widely used RF connector in the industry, offering a threaded interface that provides a secure, low-reflection connection from DC to 18 GHz. Its compact size, 50-ohm impedance, and broad frequency range make it the default choice for WiFi equipment, software-defined radios, cellular antennas, GPS receivers, and RF test instruments.

Common Applications

This SMA cable assembly is well suited for ultra-compact internal wiring in test equipment and small wireless modules. The combination of reliable SMA connectors and custom-cut cable length makes it a practical choice for both field installations and bench setups. Every assembly is hand-terminated, continuity tested, and ships free within the USA.

Other RG178 Configurations

SMA FEMALE to SMA MALE on Other Cables