The SMB (Subminiature B version) connector is a coaxial RF connector developed in the 1960s. SMB connectors are smaller than SMA connectors. They feature snap-on coupling and offer 50 Ω or 75 Ω impedance. They provide excellent electrical performance from DC to 4 GHz.
SMB connectors are available in straight or right-angle versions, as well as bulkhead, 2-hole panel, 4-hole panel, or no mounting options. These SMB connector designs include clamp/solder, crimp/solder, or solder connection methods.
The F-connector (also F-connector) is a coaxial RF connector commonly used for "over-the-air" terrestrial TV, cable TV, and generally for satellite TV and cable modems, typically using RG-6/U cable or RG-59/U cable.
The F-Type is a 75 ohm product designed for use with a variety of coaxial cables with 0.022 to 0.042 inch diameter center conductors and meets 3/8-32 thread specifications.