SMB Terminators

In modern RF modules and cable assemblies where space is limited and signal integrity is critical, proper termination of unused ports is essential to avoid reflections and maintain performance. The SMB terminator family from Amphenol RF is purpose-built for this role. These terminations mate with the same snap-on SMB interface used in many dense RF layouts, enabling fast installation, reliable impedance matching and compact form-factor integration.

SMB connectors are designed for broadband performance, with typical operation from DC to ~4 GHz and extended variants up to ~10 GHz. For system engineers specifying SMB-terminated ports in instrumentation, wireless, broadcast or cable-assembly applications, the SMB terminator line offers a standardized, reliable solution to help preserve signal chain integrity.

Features and Benefits

• Snap-on coupling mechanism (SMB interface) enables fast, tool-free installation and reduces footprint compared to large threaded connectors.
• Available in both 50 Ω standard and select 75 Ω variants to match system impedance needs in RF, broadcast or mixed-use installations.
• Compatible with high-density board-to-cable and cable-to-board assemblies where footprint and mating speed matter.
• Broadband performance supports a wide range of frequencies, helping simplify part selection across system tiers.
• Trusted supply and documentation from Amphenol RF ensures clarity for procurement, BOMs and system reliability.

Key Technical Details

• Impedance: 50 Ω nominal for SMB terminations; 75 Ω variants also offered for broadcast or video-centric use.
• Frequency range: The SMB family supports DC to ~4 GHz in standard variants and extended models up to ~10 GHz. Actual terminator performance will depend on configuration, assembly and cable.
• Mating cycles: The snap-on SMB interface supports repeated matings; mating life for a termination will vary depending on usage, cable strain and assembly conditions.
• Temperature range: Typical operating ranges for SMB connectors span industrial conditions; specific termination parts should be referenced for exact ratings.
• Special features: Compact snap-on interface, available in 50 Ω/75 Ω, optimized for high-density layouts. Note: standard SMB terminations are not hermetically sealed and do not list IP67 environmental ratings in the basic catalog.

Applications

• RF test and measurement equipment where SMB ports require dependable termination to prevent reflections or ghost signals.
• Wireless infrastructure modules, small-cell systems or backplane assemblies where high-density snap-on connections are used and mountable terminations help manage unused ports.
• Cable-assembly manufacturing and supply chains using SMB-terminated ends in instrumentation, telemetry or broadcast systems.
• Broadcast video applications or distribution networks using 75 Ω SMB terminations for impedance-matched port closures.
• High-density board-to-board or cable-to-board subsystem integrations where space is tight and terminations must maintain electrical integrity without bulky connectors.

Browse the full SMB terminator offering from Amphenol RF. If you require custom impedance, special wattage rating, alternate termination configuration or specialized environmental variant, contact our engineering team for a tailored solution.