SMB Coaxial Connectors

Overview

The SubMiniature version B (SMB) connector is a compact, snap-on RF coaxial connector designed for high-speed digital and microwave applications. Featuring a quick push-on/pull-off coupling mechanism, the SMB connector offers excellent electrical performance from DC to 4 GHz. Its small footprint and ease of mating make it an ideal solution for high-density PCB layouts and equipment requiring frequent connections.

Key Features & Benefits

• Snap-On Coupling Mechanism: The push-on design allows for quick and easy connection and disconnection without the need for tools, significantly reducing assembly and testing time.
• Compact & Lightweight: With a smaller interface than SMA connectors, SMB connectors are perfect for space-constrained applications, such as densely populated circuit boards and miniature devices.
• Excellent Electrical Performance: Designed to operate efficiently up to 4 GHz, providing reliable signal transmission with low VSWR for a wide range of telecommunication and industrial applications.
• Versatile Configurations: Available in both 50Ω and 75Ω impedances, with various styles including Straight, Right Angle, Bulkhead, and multiple termination options (PCB Mount, Crimp, Solder).

Typical Applications

• Telecommunications Base Stations & Antennas
• GPS Systems and Wireless Modules
• PCB Board-to-Board Interconnects
• Test and Measurement Equipment (frequent mating cycles)
• Consumer Electronics and IoT Devices

Technical Specifications

Comparison with Other RF Connectors

Here is how the SMB connector compares to other common RF interfaces like SMA and BNC:

Selection Guide:

• Choose SMB for compact applications requiring frequent mating cycles, blind mating, or tool-free assembly (e.g., PCB modules, GPS).
• Choose SMA for higher frequency applications (above 4 GHz) where a highly stable, vibration-resistant threaded connection is required.
• Choose BNC for lower frequency applications where a quick disconnect is needed but space is less constrained.