The Transformer,audio Frequency, cataloged under National Stock Number 5950-01-320-5766, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-01-320-5766 |
| Primary Part Number | 677-0440-010 |
| Item Name | Transformer,audio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| Status | ACTIVE |
| Inclosure Type | FULLY INCLOSED |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 0.400 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Mounting Method | TERMINAL SINGLE GROUP |
| Winding Function and Quantity | 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT |
| Impedance Rating in Ohms | 540.0 MINIMUM AND 660.0 MAXIMUM SINGLE COMPONENT SINGLE PRIMARY |
| Impedance Rating in Ohms | 540.0 MINIMUM AND 660.0 MAXIMUM SINGLE COMPONENT SINGLE SECONDARY |
| Winding Shielding Method | INTERNAL SHIELD BROUGHT OUT TO TERMINAL SINGLE COMPONENT |
| Maximum Operating Temp | 105.0 CELSIUS DEGC |
| Winding Operating Current | 0.0 MILLIAMPERES DC MINIMUM AND 2.000 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 300.0 HERTZ MINIMUM AND 3.4 KILOHERTZ MAXIMUM SINGLE COMPONENT |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 0.400 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Terminal Type and Quantity | 6 PIN |
| Hazardous Locations/environmental Protection | MOISTURE RESISTANT AND VIBRATION RESISTANT |
| 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 |
|---|---|
| 677-0440-010 | Dbp Microwave Inc. Dba Dbp Microwave Inc. (USA) |
| 677-0440-010 PRIMARY | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
| 677-0440-010 | Torotel, Inc. Div Torotel Products, Inc. (USA) |
| 677-0440-010 | "leightner Electronics, Inc." Dba Leightner Electronics Inc (USA) |
| Reference | Meaning |
|---|---|
| 677-0440-010 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5950-01-320-5766 is a Transformer,audio Frequency, manufactured by Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-01-320-5766 has 4 manufacturer part numbers on file: 677-0440-010 (Dbp Microwave Inc. Dba Dbp Microwave Inc.), 677-0440-010 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems), 677-0440-010 (Torotel, Inc. Div Torotel Products, Inc.), 677-0440-010 ("leightner Electronics, Inc." Dba Leightner Electronics Inc).
Key specifications for 677-0440-010: Overall Height: 1.040 INCHES MAXIMUM IN; Inclosure Type: FULLY INCLOSED; Center to Center Distance Between Mounting Facilities Parallel to Length: 0.400 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Mounting Method: TERMINAL SINGLE GROUP. 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.