Key Specifications
Type Design:
Standard
Connection Type:
In-Series
Connector 1 Series:
BNC
Connector 1 Gender:
Plug (Male)
Connector 2 Series:
BNC
Connector 2 Gender:
Jack (Female)
Impedance (Ohm):
50
Body Style:
Straight
Connector 1 Connection Method:
Bayonet
Connector 2 Connection Method:
Bayonet
Frequency, Max (GHz):
4.0
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:
1.30
Power, Max (Watts):
1
Attenuation Max. (dB):
20
Description
BNC Fixed Attenuator | Male to Female | 20 dB | 1 Watt | Bayonet-Lock | Brass Body with Copper-Tin-Zinc Alloy Plating
The ROSNOL FA-B1B25A-4G1W20/944-94 is a precision-engineered fixed attenuator designed for RF and microwave systems. Operating from DC to 4 GHz, it ensures 50 Ω impedance and VSWR ≤ 1.3 (≥17.69 dB return loss). This model offers a nominal attenuation of 20 dB with accuracy of ±0.5 dB, delivering stable signal control for critical applications. Rated for 1 Watt average power at 30°C, the attenuator features a bayonet-lock coupling mechanism for quick and secure connections, with mechanical durability exceeding 500 mating cycles.Constructed with premium materials, the center contact is beryllium copper with gold plating over non-magnetic nickel-phosphorus underplating for superior conductivity and corrosion resistance. The body and coupling nut are brass with copper-tin-zinc alloy plating, while PTFE insulators ensure excellent dielectric properties. Silicone rubber gaskets provide environmental sealing, and the assembly withstands temperatures from -55°C to +125°C, guaranteeing long-term reliability under harsh conditions.
ROSNOL’s RF attenuators deliver exceptional performance at competitive pricing, making them a cost-effective alternative to leading European and American brands. All products are manufactured in ISO 9001-certified facilities and fully comply with RoHS and REACH regulations. Customization services for attenuation values, materials, and plating options are available to meet specialized requirements.
