The Attenuator,variable, cataloged under National Stock Number 5985-01-263-5206, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Caes Systems Llc. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-263-5206 |
| Primary Part Number | DA-A11 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Caes Systems Llc |
| Status | ACTIVE |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 2.6 |
| Impedance Rating in Ohms | 50.0 INPUT-OUTPUT |
| Mounting Facility Type and Quantity | 2 CONNECTOR |
| Frequency Range | 3.100 GIGAHERTZ MINIMUM AND 3.500 GIGAHERTZ MAXIMUM |
| Body Style | IRREGULAR |
| Attenuation Accuracy Reference Frequency | 3.3 GIGAHERTZ |
| Adjustment Device Type and Quantity | 1 ELECTRONIC, CURRENT CONTROLLED AND 1 ELECTRONIC, VOLTAGE CONTROLLED |
| Overall Attenuation Range in Decibels | +0.0 TO 15.0 |
| Voltage Standing Wave Ratio | 1.30 |
| Overall Attenuation Accuracy in Decibels | -0.25 TO 0.25 |
| Attenuation Per Step in Decibels | 1.0 AND 2.0 AND 4.0 AND 8.0 |
| Attenuation Variation Method | STEPPED |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, FEMALE AND 1 CONNECTOR, RECEPTACLE |
| Power Rating | 1.0 WATTS AVERAGE |
| Step Position Quantity | 4 |
| Coaxial Connector Series Designation | SMA |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| DA-A11S | Caes Systems Llc (USA) |
| 5056-K45 | Robinson Laboratories Inc Dba Herley New England (USA) |
| DA-A11 PRIMARY | Caes Systems Llc (USA) |
| 2900851-4 | Caes Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| 2900851-4 | 7/2 Vendor item drawing reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 5985-01-263-5206 is a Attenuator,variable, manufactured by Caes Systems Llc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-263-5206 has 4 manufacturer part numbers on file: DA-A11S (Caes Systems Llc), 5056-K45 (Robinson Laboratories Inc Dba Herley New England), DA-A11 (Caes Systems Llc), 2900851-4 (Caes Systems Llc).
Key specifications for DA-A11: Insertion Loss at Minimum Attenuation in Maximum Decibels: 2.6; Impedance Rating in Ohms: 50.0 INPUT-OUTPUT; Mounting Facility Type and Quantity: 2 CONNECTOR; Overall Height: 1.380 INCHES NOMINAL IN. 17 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.