The Transformer,audio Frequency, cataloged under National Stock Number 5950-01-142-3865, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Pico Electronics Inc. Government technical data includes 15 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-01-142-3865 |
| Primary Part Number | DO-T53 |
| Item Name | Transformer,audio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Pico Electronics Inc |
| Status | ACTIVE |
| Transformer Function | INPUT |
| Inclosure Type | FULLY INCLOSED |
| Overall Diameter | 0.344 INCHES MAXIMUM IN |
| Mounting Method | TERMINAL SINGLE GROUP |
| Winding Function and Quantity | 2 PRIMARY AND 2 SECONDARY SINGLE COMPONENT |
| Impedance Rating in Ohms | 400.0 NOMINAL SINGLE COMPONENT FIRST PRIMARY |
| Impedance Rating in Ohms | 4000.0 NOMINAL SINGLE COMPONENT FIRST SECONDARY |
| Impedance Rating in Ohms | 500.0 NOMINAL SINGLE COMPONENT SECOND PRIMARY |
| Impedance Rating in Ohms | 5000.0 NOMINAL SINGLE COMPONENT SECOND SECONDARY |
| Body Length | 0.469 INCHES MAXIMUM IN |
| Winding Operating Current | 6.0 MILLIAMPERES DC NOMINAL SINGLE COMPONENT SECOND PRIMARY |
| Winding Operating Current | 8.0 MILLIAMPERES DC NOMINAL SINGLE COMPONENT FIRST PRIMARY |
| Reliability Indicator | NOT ESTABLISHED |
| Primary to Secondary Turn Ratio | 1 TO 10 SINGLE COMPONENT |
| Terminal Type and Quantity | 12 WIRE LEAD |
| 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 |
|---|---|
| DO-T53 PRIMARY | Pico Electronics Inc (USA) |
| Reference | Meaning |
|---|---|
| DO-T53 | 5/9 Secondary reference Opt Industries Inc Div of Electronika Inc |
| DO-T53 | 5/9 Secondary reference U.S. Government activity |
| DO-T53 | 5/9 Secondary reference Magnetika Inc Div Magnetika/phillipsburg Location |
NSN 5950-01-142-3865 is a Transformer,audio Frequency, manufactured by Pico Electronics Inc, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-01-142-3865 has 1 manufacturer part number on file: DO-T53 (Pico Electronics Inc).
Key specifications for DO-T53: Transformer Function: INPUT; Inclosure Type: FULLY INCLOSED; Overall Diameter: 0.344 INCHES MAXIMUM IN; Mounting Method: TERMINAL SINGLE GROUP. 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.
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.