QMA Connectors

Amphenol RF’s QMA connectors are designed as quick-disconnect alternatives to SMA, offering the same RF performance with a faster, tool-free snap-on coupling. These connectors feature a compact 12.4 mm pitch and a 360° rotatable interface, enabling high-density installations and simplified field servicing. Ideal for engineers searching for reliable RF interconnects in telecom, datacom and instrumentation systems.

From base stations to switching equipment, QMA connectors combine space-saving packaging with robust electrical characteristics. By eliminating thread coupling, they cut installation time while preserving low-loss RF performance up to 6 GHz, making them perfect for high-volume assemblies and applications demanding frequent mating.

Features and Benefits

• Snap-on quick disconnect—no torque or tools required
• High-density footprint—same size as SMA, more compact layout
• 360° rotation post-coupling—eases cable routing and alignment
• Low loss, SMA-level performance—reliable up to 6 GHz
• Multiple mounting options—bulkhead, PCB, cable plug and jack variants available

Key Technical Details

• Nominal impedance of 50 Ω
• Frequency performance from DC to 6 GHz (connector + cable dependent)
• High cycle durability—rated for thousands of mating cycles
• Full 360° rotatable joint for mechanical flexibility
• Materials and plating optimized for longevity and signal integrity

Applications

• Cellular base station RF paths
• Test & measurement instrumentation
• Broadband routers and switches
• Filter and amplifier board-to-board interconnects
• High-density cable assemblies in telecom and datacom environments

Browse our available QMA products to find a standard solution that fits your application. For design-specific modifications or engineering support, please contact us directly.