Key Specifications
Type Design:
Standard
Connection Type:
In-Series
Connector 1 Series:
QMA
Connector 1 Gender:
Plug (Male)
Connector 2 Series:
QMA
Connector 2 Gender:
Jack (Female)
Impedance (Ohm):
50
Body Style:
Straight
Connector 1 Connection Method:
Quick-Lock
Connector 2 Connection Method:
Quick-Lock
Frequency, Max (GHz):
3.0
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:
1.25
Power, Max (Watts):
2
Attenuation Max. (dB):
7
Description
QMA Fixed Attenuator | Plug (Male) to Jack (Female) | 7 dB | 2W | Quick-Lock | Brass Body
The ROSNOL FA-QA1QA25A-3G2W7/944-94 fixed attenuator operates from DC to 3 GHz with 50 Ω impedance and VSWR ≤ 1.25 (≥ 19.08 dB). It provides a nominal 7 dB attenuation with ±0.4 dB accuracy across DC–3 GHz, and supports 2W average input power at 25 °C. Insertion loss is not specified in this data sheet; insulation resistance is ≥ 5 GΩ. The Quick-Lock coupling ensures secure engagement; weight is not specified.Piece-part construction includes a beryllium copper (BeCu) centre contact with gold plating over nickel underplating, a brass body (copper–tin–zinc alloy), and a PTFE insulator—engineered for corrosion resistance and dielectric stability across −55 °C to +130 °C.
ROSNOL’s precision-engineered RF attenuators deliver reliable performance across a wide range of RF and microwave systems. Designed to meet the stringent demands of high-frequency signal transmission, ROSNOL attenuators 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. Customization services for materials, plating, and mechanical design are available to support specialized interconnect requirements.
