The Transformer,audio Frequency, cataloged under National Stock Number 5950-00-645-0824, 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 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5950-00-645-0824 |
| Primary Part Number | LS55 |
| Item Name | Transformer,audio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Magnetika Inc |
| Status | ACTIVE |
| Mounting Facility Quantity | 4 SINGLE GROUP |
| Inclosure Type | FULLY INCLOSED |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 3.688 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Mounting Method | UNTHREADED HOLE(S) SINGLE GROUP |
| Body Width | 3.500 INCHES NOMINAL IN |
| Body Height | 4.438 INCHES NOMINAL IN |
| Mounting Hole Diameter | 0.250 INCHES NOMINAL SINGLE GROUP IN |
| Winding Function and Quantity | 2 PRIMARY AND 4 SECONDARY SINGLE COMPONENT |
| Impedance Rating in Ohms | 1500.0 NOMINAL SINGLE COMPONENT ALL PRIMARY |
| Impedance Rating in Ohms | 2.5 NOMINAL AND 7.5 NOMINAL SINGLE COMPONENT FOURTH SECONDARY |
| Impedance Rating in Ohms | 50.0 NOMINAL AND 125.0 NOMINAL AND 2.5 NOMINAL SINGLE COMPONENT SECOND SECONDARY |
| Impedance Rating in Ohms | 50.0 NOMINAL AND 125.0 NOMINAL SINGLE COMPONENT FIRST SECONDARY |
| Impedance Rating in Ohms | 7.5 NOMINAL SINGLE COMPONENT THIRD SECONDARY |
| Body Length | 4.188 INCHES NOMINAL IN |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 7.0 HERTZ MINIMUM AND 50.000 KILOHERTZ MAXIMUM SINGLE COMPONENT |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 2.688 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Terminal Type and Quantity | 18 SOLDER STUD |
| 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 |
|---|---|
| LS55 PRIMARY | Magnetika Inc (USA) |
| Reference | Meaning |
|---|---|
| LS55 | 5/9 Secondary reference U.S. Government activity |
| N140T102P | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5950-00-645-0824 is a Transformer,audio Frequency, manufactured by Magnetika Inc, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-645-0824 has 1 manufacturer part number on file: LS55 (Magnetika Inc).
1 possible match (shared part number, not a government interchangeability claim): 4130-01-076-8629. Verify interchangeability with system specifications before substitution.
Key specifications for LS55: Mounting Facility Quantity: 4 SINGLE GROUP; Inclosure Type: FULLY INCLOSED; Center to Center Distance Between Mounting Facilities Parallel to Length: 3.688 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Mounting Method: UNTHREADED HOLE(S) SINGLE GROUP. 18 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.