The Attenuator,variable, cataloged under National Stock Number 5985-01-065-3077, 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 Westinghouse Electric Corp. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5985-01-065-3077 |
| Primary Part Number | 128C813H01 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Impedance Rating in Ohms | 50.0 INPUT-OUTPUT |
| Mounting Facility Type and Quantity | 2 UNTHREADED HOLE(S) |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Frequency Range | 0.000 GIGAHERTZ MINIMUM AND 2.000 GIGAHERTZ MAXIMUM |
| Body Style | COAXIAL TYPE |
| Mounting Facility Pattern | TWO POSITION IN-LINE |
| Adjustment Device Type and Quantity | 1 KNOB |
| Overall Attenuation Range in Decibels | +0.0 TO 10.0 |
| Voltage Standing Wave Ratio | 1.50 |
| Unthreaded Mounting Hole Diameter | 0.219 INCHES NOMINAL IN |
| Attenuation Per Step in Decibels | 1.0 |
| Attenuation Variation Method | STEPPED |
| Distance Between Mounting Facility Centers | 1.062 INCHES NOMINAL IN |
| Operating Temp Range | -20.0 TO 125.0 CELSIUS DEGC |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, FEMALE |
| Power Rating | 1.0 WATTS AVERAGE |
| Step Position Quantity | 10 |
| 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 |
|---|---|
| 3803-50521 | Airbus Defence and Space Limited (GBR) |
| 128C813H01 PRIMARY | Westinghouse Electric Corp (USA) |
| 3803-50521-40-4 | Airbus Defence and Space Limited (GBR) |
| Reference | Meaning |
|---|---|
| RA-50SMA | 5/9 Secondary reference Trilithic, Inc. |
NSN 5985-01-065-3077 is a Attenuator,variable, manufactured by Westinghouse Electric Corp, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-065-3077 has 3 manufacturer part numbers on file: 3803-50521 (Airbus Defence and Space Limited), 128C813H01 (Westinghouse Electric Corp), 3803-50521-40-4 (Airbus Defence and Space Limited).
Key specifications for 128C813H01: Impedance Rating in Ohms: 50.0 INPUT-OUTPUT; Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S); Overall Height: 2.188 INCHES NOMINAL IN; FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT. 19 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.