The Transformer,audio Frequency, cataloged under National Stock Number 5950-01-057-8907, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Custom Transformers. Government technical data includes 11 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5950-01-057-8907 |
| Primary Part Number | CT 2556 |
| Item Name | Transformer,audio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Custom Transformers |
| Status | ACTIVE |
| Inclosure Type | FULLY INCLOSED |
| Mounting Method | TERMINAL SINGLE GROUP |
| Body Width | 0.687 INCHES NOMINAL IN |
| Body Height | 0.812 INCHES NOMINAL IN |
| Winding Function and Quantity | 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT |
| Impedance Rating in Ohms | 5000.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY |
| Impedance Rating in Ohms | 50.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| Body Length | 0.812 INCHES NOMINAL IN |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 300.0 HERTZ MINIMUM AND 5.0 KILOHERTZ MAXIMUM SINGLE COMPONENT |
| Terminal Type and Quantity | 5 PIN |
| 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 |
|---|---|
| CT 2556 PRIMARY | Custom Transformers (USA) |
| Reference | Meaning |
|---|---|
| TM-2556 | 5/9 Secondary reference Transformers Inc |
| 560034-001 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 560034-001 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5950-01-057-8907 is a Transformer,audio Frequency, manufactured by Custom Transformers, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-01-057-8907 has 1 manufacturer part number on file: CT 2556 (Custom Transformers).
Key specifications for CT 2556: Overall Height: 0.812 INCHES NOMINAL IN; Inclosure Type: FULLY INCLOSED; Mounting Method: TERMINAL SINGLE GROUP; Body Width: 0.687 INCHES NOMINAL IN. 11 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.