The Transformer,audio Frequency, cataloged under National Stock Number 5950-01-262-9642, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Elcos. Government technical data includes 14 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-01-262-9642 |
| Primary Part Number | PICO-4890 |
| Item Name | Transformer,audio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Elcos |
| Status | ACTIVE |
| Inclosure Type | FULLY INCLOSED |
| Body Outside Diameter | 0.300 INCHES MAXIMUM IN |
| Mounting Method | TERMINAL SINGLE GROUP |
| Maximum Transformer Power Rating | 1.0 MILLIWATTS SINGLE COMPONENT |
| Criticality Code Justification | FEAT |
| Winding Function and Quantity | 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT |
| Impedance Rating in Ohms | 180.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| Impedance Rating in Ohms | 180.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY |
| Maximum Operating Temp | 145.0 CELSIUS DEGC |
| Body Length | 0.325 INCHES MAXIMUM IN |
| Winding Operating Current | 500.0 MILLIAMPERES DC NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 400.0 HERTZ MINIMUM AND 50.0 KILOHERTZ MAXIMUM SINGLE COMPONENT |
| Terminal Type and Quantity | 4 WIRE LEAD |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| PICO-4890 | Elcos (BEL) |
| PICO-4890 | Pico Electronics Inc (USA) |
| CSF-976 | Magnetika Inc (USA) |
| CSF-976 | Elcos (BEL) |
| Reference | Meaning |
|---|---|
| CSF-976 | 5/9 Secondary reference U.S. Government activity |
| CSF-976 | 5/9 Secondary reference Opt Industries Inc Div of Electronika Inc |
| CSF-976 | 5/9 Secondary reference Magnetika Inc Div Magnetika/phillipsburg Location |
| CSF-976 | 5/9 Secondary reference Pico Electronics Inc |
| A3012899-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5950-01-262-9642 is a Transformer,audio Frequency, manufactured by Elcos, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-01-262-9642 has 4 manufacturer part numbers on file: PICO-4890 (Elcos), PICO-4890 (Pico Electronics Inc), CSF-976 (Magnetika Inc), CSF-976 (Elcos).
Key specifications for PICO-4890: Inclosure Type: FULLY INCLOSED; Body Outside Diameter: 0.300 INCHES MAXIMUM IN; Mounting Method: TERMINAL SINGLE GROUP; Maximum Transformer Power Rating: 1.0 MILLIWATTS SINGLE COMPONENT. 14 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.