The Transformer,audio Frequency, cataloged under National Stock Number 5950-00-682-3798, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Magnetika Inc. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-00-682-3798 |
| Primary Part Number | W9891 |
| Item Name | Transformer,audio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Magnetika Inc |
| Status | ACTIVE |
| Transformer Function | LINE |
| Mounting Facility Quantity | 1 SINGLE GROUP |
| Inclosure Type | HERMETICALLY SEALED |
| Mounting Method | CORE AND THREADED STUD(S) SINGLE GROUP |
| Body Width | 0.687 INCHES NOMINAL IN |
| Body Height | 1.125 INCHES NOMINAL IN |
| Maximum Transformer Power Rating | 20.0 DECIBELS SINGLE COMPONENT |
| Winding Function and Quantity | 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT |
| Impedance Rating in Ohms | 100000.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| Impedance Rating in Ohms | 12.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY |
| Nominal Thread Size | 0.112 INCHES SINGLE GROUP IN |
| Body Length | 0.812 INCHES NOMINAL IN |
| Winding Operating Current | 1.5 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY |
| Winding Operating Current | 1.66 AMPERES DC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 1.0 KILOHERTZ MINIMUM AND 5.0 KILOHERTZ MAXIMUM SINGLE COMPONENT |
| Thread Quantity Per Inch | 40 SINGLE GROUP |
| Primary to Secondary Turn Ratio | 1 TO 7-1/2 SINGLE COMPONENT |
| Terminal Type and Quantity | 5 TAB, SOLDER LUG |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP |
| 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 |
|---|---|
| W9891 PRIMARY | Magnetika Inc (USA) |
| Reference | Meaning |
|---|---|
| W9891 | 5/9 Secondary reference U.S. Government activity |
| W9891 | 5/9 Secondary reference Esco Inc |
NSN 5950-00-682-3798 is a Transformer,audio Frequency, manufactured by Magnetika Inc, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-682-3798 has 1 manufacturer part number on file: W9891 (Magnetika Inc).
Key specifications for W9891: Transformer Function: LINE; Mounting Facility Quantity: 1 SINGLE GROUP; Inclosure Type: HERMETICALLY SEALED; Mounting Method: CORE AND THREADED STUD(S) SINGLE GROUP. 20 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.