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):
18
Connector 1 Body Material:
Stainless Steel
Connector 1 Body Plating:
Passivated
Connector 2 Body Material:
Stainless Steel
Connector 2 Body Plating:
Passivated
VSWR, Max:
1.20
Power, Max (Watts):
5
Attenuation Max. (dB):
20
Description
Fixed Attenuator 20 dB | SMA Plug (Male) to SMA Jack (Female) | Screw-Lock | Stainless Steel Body
The ROSNOL FA-A1A25A-18G5W20/9XX-9X is a precision-engineered fixed attenuator for RF and microwave systems. It operates across DC to 18 GHz with a nominal attenuation of 20 dB, maintaining an impedance of 50 Ω and a VSWR of ≤ 1.20 (Return Loss ≥ 20.8 dB). Power handling capability is 5 W average at 25°C; Peak 50 W (5 µs pulse, 1% duty cycle). Attenuation accuracy is specified at −0.6/+0.8 dB. A robust Screw-Lock coupling mechanism ensures secure engagement, rated for ≥500 mating cycles with retention metrics (Coupling nut retention ≥270 N; Center contact axial ≥20 N). Recommended coupling torque is Recommended 0.9 N·m; Test torque ≤1.7 N·m.Materials and plating are engineered for long-term reliability: centre contact—Beryllium Copper, Gold plating 3 µinch over non-magnetic nickel-phosphorus underplating 80 µinch; body—Stainless Steel, Passivated; insulator—PTFE; gasket—Silicone Rubber; coupling nut—Stainless Steel, Passivated; heatsink—Aluminum, Black anodized. Gold plating over nickel-phosphorus underplating on the conductive path enhances corrosion resistance and electrical stability. Operational temperature range: -55°C to +125°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.
