Key Specifications
Type Design:
Standard
Connection Type:
Between Series
Connector 1 Series:
QMA
Connector 1 Gender:
Plug (Male)
Connector 2 Series:
SMA
Connector 2 Gender:
Jack (Female)
Impedance (Ohm):
50
Body Style:
Straight
Panel Mount:
None
Connector 1 Connection Method:
Quick-Lock
Connector 2 Connection Method:
Threaded (Screw-lock)
Frequency, Max (GHz):
18
Connector 1 Body Material:
Brass
Connector 1 Body Plating:
Copper-Tin-Zinc Alloy
Connector 2 Body Material:
Brass
Connector 2 Body Plating:
Copper-Tin-Zinc Alloy
VSWR, Max:
1.20
Description
QMA Plug (Male) to SMA Jack (Female) | Straight Adapter | Quick-Lock & Screw-Lock | Brass Body
The ROSNOL AD-QA1A25B/944-94 is a high-quality RF adapter for DC to 18 GHz with 50 Ω impedance. It offers VSWR ≤ 1.20 and insertion loss ≤ 0.05√F (GHz) dB, ensuring low reflection and excellent return loss. Insulation resistance is ≥5 GΩ, and the adapter supports ≥100 mating cycles on the QMA side and ≥500 on the SMA side. Coupling mechanisms include quick-lock for QMA and screw-lock for SMA, with center contact captivation ≥20 N for secure, repeatable connections.Center contacts are beryllium copper with 3 microinch gold plating over an 80 microinch nickel-phosphorus underplating. Bodies and coupling nuts are brass with corrosion-resistant finish, and insulators are PTFE. Recommended torque for the SMA side is 0.56 Nm. The operating temperature range is −40°C to +85°C, providing durability under demanding conditions.
ROSNOL’s precision-engineered RF adapters deliver consistent performance and represent a cost-effective alternative to leading European and American brands. All components are manufactured in ISO 9001-certified facilities and comply with RoHS and REACH standards. Customization services for materials, plating, and mechanical design are available to support specialized interconnect needs.
