SMB Connectors

At Amphenol RF, our SMB connector series provides a proven and versatile solution for engineers and buyers seeking compact, quick-connect RF interfaces. The SMB family supports broadband performance, 50 Ω (and dedicated 75 Ω) impedance options and broad cable and PCB compatibility — making it a strong candidate for applications ranging from instrumentation to wireless infrastructure.

With its snap-on coupling mechanism, MIL-C-39012 interface compliance and MIL-STD-348 design lineage, the SMB series balances space-efficient packaging with reliable electrical performance.

Features and Benefits

• Snap-on coupling mechanism reduces installation time and allows for rapid mating/demating in field or assembly environments.
• Broadband capability: standard designs support DC to ~4 GHz, with extended-range variants rated to ~10 GHz.
• Available in both 50 Ω and 75 Ω impedance variants—supporting standard RF systems and video/broadcast applications.
• Compact sub-miniature form-factor accommodates space-constrained board-to-cable or cable-to-board architectures.
• Variety of plating and material options (nickel, gold, tin-lead) satisfy cost, corrosion or solderability requirements.
• Low insertion-force PCB slide-on plug/jack variants enable dense board-to-board configurations with minimal mating strain.

Key Technical Details

• Impedance: 50 Ω standard; 75 Ω variants available for broadcast/video-centric systems.
• Frequency Range: DC to ~4 GHz in standard SMB designs; up to ~10 GHz in extended-range versions (dependent on connector configuration and cable).
• Mating Cycles: Minimum 500 mating cycles typical for SMB series.
• Temperature Range: −65 °C to +165 °C typical; performance may vary with configuration and cable type.
• Special Features: Snap-on coupling, 50 Ω/75 Ω options, multiple plating alternatives; note that standard SMB series from Amphenol RF are not hermetically sealed and IP-rated sealed variants are not listed for this series.

Applications

The SMB connector family is well suited for a wide range of system uses:

• Wireless infrastructure and base-station modules where compact, quick-connect RF interfaces are needed.
• Instrumentation and test equipment requiring frequent mate/demate operations and board-mount or cable-mount integration.
• Broadcast and video-link systems leveraging 75 Ω SMB variants for impedance-matched signal paths.
• GPS, telemetry and data-communications platforms needing space-efficient, high-density RF interconnect solutions.
• Cable-to-board or board-to-board interconnects in systems where mature supply chain, global availability and repeatable RF performance are requisite.

Explore our full SMB standard-product connector lineup. If you require a custom termination, alternate material, specialty plating or a tailored variant outside the standard offerings, please contact our engineering team for a bespoke solution.