Murata Manufacturing has commenced mass production of its SWL series MM8330-2600RJ5 and MM8330-2600RK20, recognized as the world’s smallest RF/microwave coaxial connectors with a switch. Measuring only 1.0 mm × 1.0 mm × 0.55 mm, these compact connectors reduce PCB mounting space by approximately 40% compared with Murata’s earlier SWJ series. When paired with dedicated probes, the overall PCB footprint, including the required clearance area, is reduced by around 60%.
As wireless devices continue to integrate more features, the growing number of electronic components is creating greater demand for limited PCB space. RF test connectors also need additional clearance around them to allow probe access for circuit testing and measurements, making compact connector designs increasingly important.
Reducing the Space Required for RF Measurement
Murata addresses these constraints with a proprietary structure that combines its RF and mechanical design technologies. The design achieves miniaturization while maintaining low RF transmission loss and mechanical robustness. At 1.0 mm × 1.0 mm × 0.55 mm, the SWL series is smaller than Murata’s previous SWJ series, which measures 1.4 mm × 1.2 mm × 0.65 mm, allowing greater flexibility in PCB component placement.
When used with the dedicated automatic or manual probe, the connector requires less clearance around the test point, reducing the total board area required for RF measurement. The dedicated probes are scheduled to enter mass production in December 2026.
Supporting Frequencies up to 15 GHz
The SWL series supports a frequency range from DC to 15 GHz with a nominal impedance of 50 Ω. The MM8330-2600RJ5 is supplied on reels of 5,000 pieces, while the MM8330-2600RK20 is supplied on reels of 20,000 pieces.
Murata will continue developing smaller electronic components and solutions that enable more effective use of limited PCB space, supporting higher-performance and more compact smartphones and wearable devices.
Notes:
* Based on Murata research as of October 28, 2026.
