Key Specifications
Type Design:
Standard
Connection Type:
In-Series
Connector 1 Series:
SMA
Connector 1 Gender:
Plug (Male)
Connector 2 Series:
SMA
Connector 2 Gender:
Jack (Female)
Impedance (Ohm):
50
Body Style:
Straight
Connector 1 Connection Method:
Threaded (Screw-lock)
Connector 2 Connection Method:
Threaded (Screw-lock)
Frequency, Max (GHz):
3.0
Connector 1 Body Material:
Brass
Connector 1 Body Plating:
Gold Plating (Nickel underplated)
Connector 2 Body Material:
Brass
Connector 2 Body Plating:
Gold Plating (Nickel underplated)
VSWR, Max:
1.25
Power, Max (Watts):
2
Attenuation Max. (dB):
3
Description
Fixed Attenuator 3 dB | SMA Plug (Male) to SMA Jack (Female) | Screw-Lock | Brass Body
The ROSNOL FA-A1A25A-3G2W3/911-91 is a precision-engineered fixed attenuator for RF and microwave systems. It operates across DC to 3 GHz with a nominal attenuation of 3 dB, maintaining an impedance of 50 Ω and a VSWR of ≤ 1.25 (Return Loss ≥ 19.08 dB). Power handling capability is 2 W average at 25°C. Attenuation accuracy is specified at ±0.5 dB. A secure Screw-Lock coupling mechanism supports reliable engagement, rated for ≥500 mating cycles, with centre contact captivation axial ≥27 N and radial ≥3 N·cm. Recommended coupling torque: Recommended 0.8–1.1 N·m; Test torque ≤1.7 N·m.Materials and plating: centre contact—Beryllium Copper, Gold plating over non-magnetic nickel-phosphorus underplating; body—Brass, Gold plating over non-magnetic nickel-phosphorus underplating; insulator—PTFE; gasket—Silicone Rubber; coupling nut—Brass, Gold plating over non-magnetic nickel-phosphorus underplating. Gold plating over nickel or nickel‑phosphorus underplating on conductive elements enhances corrosion resistance and electrical stability. Operational temperature range: -55°C to +85°C.
ROSNOL’s precision-engineered RF attenuators deliver reliable performance and competitive pricing for RF and microwave systems. Manufactured in ISO 9001-certified facilities, all products comply with RoHS and REACH regulations. Customization services for materials, plating, and mechanical design are available, making ROSNOL an effective alternative to leading European and American brands.
