Key Specifications
Type Design:
Standard
Connection Type:
In-Series
Connector 1 Series:
SMA
Connector 1 Gender:
Jack (Female)
Connector 2 Series:
SMA
Connector 2 Gender:
Plug (Male)
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:
Brass
Connector 1 Body Plating:
Nickel
Connector 2 Body Material:
Brass
Connector 2 Body Plating:
Nickel
VSWR, Max:
1.30
Power, Max (Watts):
25
Attenuation Max. (dB):
20
Description
Fixed Attenuator 20 dB | SMA Plug (Male) to SMA Jack (Female) | Screw-Lock | Brass Body
The ROSNOL FA-A1A25A-18G25W20/133-H3 is a high-power fixed attenuator engineered 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 ≤ 1.30 (Return Loss ≥ 17.69 dB). Power handling capability reaches 25 W average at 25°C (derates to 0.5 W at 125°C), Peak 1000 W, ensuring reliable performance under demanding conditions. Attenuation accuracy is specified at ±1.0 dB.Constructed with premium materials for durability: centre contact—Phosphor Bronze, Gold plating over Nickel underplating; body—Brass, Nickel plating; insulator—PTFE; gasket—Silicone Rubber; coupling nut—Brass, Nickel plating. Gold plating over nickel underplating on conductive elements enhances corrosion resistance and ensures stable electrical performance. Operational temperature range: -55°C to +125°C.
ROSNOL’s precision-engineered RF attenuators deliver dependable performance and cost-effective solutions 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 ideal alternative to leading European and American brands.
