SA3NFM300W-20 FAIRVIEW | Alldatasheet
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Fairview Microwave carries a broad selection of fixed attenuators with a wide range of attenuation levels, frequency ranges, and power dissipation ranges. Also known as RF pads, RF microwave attenuators lower the amplitude of a signal (or attenuate) a known amount. These attenuator pads can be used in a wide variety of applications including reducing a signal level to protect measurement equipment or other circuitry, extending the range of power meters and amplifiers, and impedance matching circuits by reducing the VSWR seen by adjacent components. RF attenuators can prevent signal overload in amplifiers, receivers and detectors, adjusting the signal level to a range that is optimal. Few RF components are as commonly used as fixed coaxial attenuators, and Fairview Microwave carries one of the largest in-stock varieties and ships them same day. The SA3NFM300W-20 is a 20 dB Fixed Attenuator that operates from DC to 3 GHz and is rated to 300 Watts. The versatile coaxial package uses type N female to type N male connectors. The Black Aluminum Heatsink body allows for efficient heat dissipation under high power usage conditions. Electrical Specifications Description Minimum Typical Maximum Units Frequency Range DC 3 GHz Impedance 50 Ohms Nominal Attenuation 20 dB Attenuation Accuracy 1.25 dB VSWR 1.4:1 Input Power, CW 300 Watts Input Power, Peak 2.5 kWatts Specifications by Frequency Description F1 F2 F3 F4 F5 Units Frequency Range DC to 1.5 1.5 to 3 GHz VSWR, Max 1.2:1 1.4:1 Attenuation Accuracy, Typ 1 1.25 dB Mechanical Specifications Size Length 0 in [0 mm] Width/Diameter 6.2 in [157.48 mm] Height 6.3 in [160.02 mm] Weight lbs [0 g] Body Material and Plating Black Aluminum Heatsink
The Right Parts, Right Away +1 (866) 839-4711 | sales@fairviewmicrowave.com | fairviewmicrowave.com © 2025 Infinite Electronics, Inc. Fairview Microwave is a registered trademark of Infinite Electronics, Inc. 20 dB Fixed Attenuator N Female (Jack) to N Male (Plug) Directional Up to 3 GHz Rated to 300 Watts, Heatsink Body, 1.4 VSWR SA3NFM300W-20 Configuration Design Fixed, Directional Connectors Description Connector 1 Connector 2 Type N Female N Male Contact Material and Plating Beryllium Copper, Gold Beryllium Copper, Gold Outer Conductor Material and Plating Passivated Stainless Steel Coupling Nut Material and Plating Passivated Stainless Steel Body Material and Plating Passivated Stainless Steel Passivated Stainless Steel Environmental Specifications Temperature Operating Range -55 to +125 deg C Compliance Certifications (see product page for current document) Plotted and Other Data Notes: Typical Performance Data 20 dB Fixed Attenuator N Female (Jack) to N Male (Plug) Directional Up to 3 GHz Rated to 300 Watts, Heatsink Body, 1.4 VSWR from Fairview Microwave is in-stock and available to ship same-day. All of our RF/microwave products are available off-the-shelf from our ISO 9001:2008 certified facilities in Lewisville, Texas. Fairview Microwave is RF on-demand. For additional information on this product, please click the following link: 20 dB Fixed Attenuator N Female (Jack) to N Male (Plug) Directional Up to 3 GHz Rated to 300 Watts, Heatsink Body, 1.4 VSWR SA3NFM300W-20 URL: https://www.fairviewmicrowave.com/20db-fixed-attenuator-n-female-n-male-300-watts-sa3nfm300w-20-p.aspx The information contained within this document is accurate to the best of our knowledge and representative of the part described herein. It may be necessary to make modifications to the part and/or the documentation of the part in order to impliment improvements. Fairview Microwave reserves the right to make such changes as required. Unless otherwise stated, all specifications are nominal. Fairview Microwave does not make any representation or warranty regarding the suitability of the part described herein for any particular purpose, and Fairview Microwave does not assume liability arising out of the use of any part or document.