The Transformer,audio Frequency, cataloged under National Stock Number 5950-00-781-3289, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Freed Transformer Co. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-00-781-3289 |
| Primary Part Number | 37833 |
| Item Name | Transformer,audio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Freed Transformer Co |
| Status | ACTIVE |
| Transformer Function | INPUT |
| Mounting Facility Quantity | 2 SINGLE GROUP |
| Inclosure Type | FULLY INCLOSED |
| Mounting Method | FLANGE AND UNTHREADED HOLE(S) SINGLE GROUP |
| Body Width | 0.760 INCHES NOMINAL IN |
| Mounting Hole Diameter | 0.125 INCHES NOMINAL SINGLE GROUP IN |
| Winding Function and Quantity | 1 PRIMARY AND 2 SECONDARY SINGLE COMPONENT |
| Impedance Rating in Ohms | 10000.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| Impedance Rating in Ohms | 5000.0 NOMINAL SINGLE COMPONENT ALL SECONDARY |
| Distance Between Mounting Facility Centers | 1.188 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Body Length | 0.920 INCHES NOMINAL IN |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 400.0 HERTZ NOMINAL SINGLE COMPONENT |
| Primary to Secondary Turn Ratio | 1 TO 0.5 OVER ALL SINGLE COMPONENT |
| Terminal Type and Quantity | 6 WIRE LEAD |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 37833 PRIMARY | Freed Transformer Co (USA) |
| HB574 PRIMARY | Magnetika Inc (USA) |
| Reference | Meaning |
|---|---|
| 124A54 | 5/9 Secondary reference A.e.york, Llc |
| BC3255 | 5/9 Secondary reference U.S. Government activity |
| 124A54 | C/1 Advisory reference — outside the item-of-supply concept Rayco Electronic Manufacturing, Inc. Div Rayco Electronics Mfg Inc |
| T24A54 | 5/9 Secondary reference A.e.york, Llc |
| 677-9020-00 | 7/2 Vendor item drawing reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| HB574 | 5/9 Secondary reference U.S. Government activity |
NSN 5950-00-781-3289 is a Transformer,audio Frequency, manufactured by Freed Transformer Co, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-781-3289 has 2 manufacturer part numbers on file: 37833 (Freed Transformer Co), HB574 (Magnetika Inc).
1 possible match (shared part number, not a government interchangeability claim): 5945-01-532-5709. Verify interchangeability with system specifications before substitution.
Key specifications for 37833: Overall Height: 0.708 INCHES MAXIMUM IN; Transformer Function: INPUT; Mounting Facility Quantity: 2 SINGLE GROUP; Inclosure Type: FULLY INCLOSED. 15 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.
NSN 5950-00-781-3289 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.