SMA Plug (Male) to QMA Jack (Female) Adapter, DC-18GHz VSWR 1.20

SMA Plug (Male) to QMA Jack (Female) | Straight Adapter | Quick-lock | Brass Body

The ROSNOL AD-A1QA25A/944-94 adapter delivers reliable RF performance with 50 Ω impedance and DC–18 GHz frequency range. It achieves VSWR ≤ 1.20 (≥ 20.83 dB return loss), insertion loss ≤ 0.05 × √F (GHz) dB, and insulation resistance ≥ 5 GΩ. Contact resistance is ≤ 3.0 mΩ for both SMA and QMA sides, while outer contact resistance is ≤ 2.0 mΩ (SMA) and ≤ 2.5 mΩ (QMA). Rated for 1000 V rms test voltage and 480 V rms working voltage, this adapter ensures stable signal integrity. Mechanical features include screw-lock coupling on the SMA side and quick-lock engagement for QMA, with mating cycles of 500 (SMA) and 100 (QMA).

Constructed from brass with copper-tin-zinc alloy for body and coupling nut, this adapter guarantees durability and corrosion resistance. Center contacts are beryllium copper with 3 μinch gold plating over 80 μinch non-magnetic nickel-phosphorus underplating. Insulators are PTFE for both ends, complemented by silicone rubber gaskets for environmental sealing. Dimensions include overall length 23.19 mm [.913 in], hex sizes 8 mm [.315 in] and 5.5 mm [.215 in].

ROSNOL’s precision-engineered RF adapters deliver reliable performance across a wide range of RF and microwave systems. Designed to meet the stringent demands of high-frequency signal transmission, ROSNOL adapters offer a cost-effective alternative to products from leading European and American brands. All ROSNOL RF components are manufactured in ISO 9001-certified facilities and fully comply with RoHS and REACH regulations, ensuring global environmental and safety standards. Customization services for materials, plating, and mechanical design are available to support specialized interconnect requirements.