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Dry, Convection-Cooled, Bi-Directional 2 Watts to 300 Watts
Bird™s A-Series RF attenuators feature high-quality, robust construction, and conservative power ratings. A-Series attenuators will operate at 120% of nominal power rating at 25°C and below. Bi-directional operation permits either connector to be used as the input without fear of burnout.

Temperature Derating Curves

General Specifications

  • Impedance: 50 ohms, nominal.
  • Coolant type: Dry (convention cooled).
  • Ambient Temperature Range: -40°C to +40°C.
  • Operating Position: 2W-75W:Any.100W - 300W: Vertical.
  • Finish: Connectors, and 2W & 5W bodies: Silver or tri-alloy plated, except nickel plate for BNC male-female and 2W SMA models.Fin Assemblies: Black anodized, or black semi-gloss paint per federal standard 595

  • Convection-cooled for quiet, maintenance-free operation.
  • Maximum VSWR of 1.10:1 at 1GHz; 1.25:1 max. at up to 4 GHz, as noted.
  • Bi-directional designs for maximum convenience-use either connector for input.
  • Wide variety of connector options.
dB
Attenuation		 ACCURACY
DC to 1 MHz		 1 MHz to
Max. Frequency
1 ±0.3 dB ±0.5 dB
2 ±0.3 dB ±0.5 dB
3 ±0.3 dB ±0.5 dB
6 ±0.4 dB ±0.6 dB
10 ±0.4 dB ±0.8 dB
20 ±0.5 dB ±1.0 dB
30 ±0.8 dB ±1.3 dB
Model
Series		 Power Frequency
@Max.VSWR		 Conn.
Options

Dimensions**
with N Conn.

 Weight
2-A-MFA 2.0W@40°C
2.0W@25°C		 DC-1GHz@1.10:1
DC-4GHz@1.25:1N		 SMA (M+F) 1.3" L x 0.42" Dia
40.7mm x20.4mm		 0.4oz
(11.4 g)
2-A 2.0W@40°C
2.0W@25°C		 DC-1GHz@1.10:1
DC-4GHz@1.25:1 N		 BNC,N,TNC 2.17" L x 0.8" Dia
55.2mm x20.4mm		 3.1oz
(88 g)
5-A 5.0W@40°C
6.0W@25°C		 DC-1GHz@1.10:1
DC-4GHz@1.25:1 N		 BNC,N,TNC 2.17" L x 0.8" Dia
55.2mm x20.4mm		 3.1oz
(88 g)
10-A 10W@40°C
12W@25°C		 DC-1GHz@1.10:1
DC-4GHz@1.25:1		 BNC,N,TNC 2.59" L x 2.3" Dia
65.8 x 58.5mm		 6.2oz
(177 g)
25-A 25W@40°C
30W@25°C		 DC-1GHz@1.10:1
DC-4GHz@1.25:1		 BNC,N,TNC 5.29" L x 2.3" Dia
134.4 x 58.5mm		 12.3oz
(351 g)
50-A 50W@40°C
60W@25°C		 DC-1GHz@1.10:1
DC-2.4GHz@1.25:1		 BNC,N,TNC

5.29" L x 2.3" Dia
134.4 x 58.5mm

 1.19oz
(542 g)
75-A 75W@40°C
90W@25°C		 DC-1GHz@1.10:1
DC-2.4GHz@1.25:1		 BNC,N,TNC 7.29" L x 2.3" Dia
185.2mm x 58.5 mm		 1.44oz
(656 g)
100-A 100W@40°C
120W@25°C		 DC-2GHz@1.10:1
2.3GHz@1.25:1		 BNC,N,TNC
IEC7/16		 6.4"H x 2.6"W x 6.8"D
162.6 x 66.1 x172.8mm		 4.3 lb
(1.95 kg)
150-A 150W@40°C
180W@25°C		 DC-1GHz@1.10:1
DC-2.4GHz@1.25:1		 BNC,N,TNC
IEC7/16		 11.87"H x 2.6"W x 6.8"D
301.5 x 66.1 x172.8mm		 6.6oz
(2.95 g)
300-A 300W@40°C
360W@25°C		 DC-1GHz@1.10:1
DC-2.4GHz@1.25:1		 BNC,N,TNC
IEC7/16		 10.87"H x 5.4"W x 6.8"H
276.1 x 137.2x172.8mm		 12 lb
(5.45 g)
* Dimensions and weight are for reference only, and are nominal values for units with male N-type connector, or supplied connector
if N-type is not available. Form factor for higher power models varies from illustrated examples.
WISCO International, Inc. - MIAMI, FL U.S.A.
Fax: (954) 370-3997 | E-mail: wiscointl@wiscointl.com

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