The Transformer,power, cataloged under National Stock Number 5950-01-369-9021, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Transistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division. Government technical data includes 29 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-01-369-9021 |
| Primary Part Number | 3391 |
| Item Name | Transformer,power |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Transistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division |
| Status | ACTIVE |
| Mounting Facility Quantity | 4 ALL GROUPINGS |
| Inclosure Type | FULLY INCLOSED |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 4.260 INCHES NOMINAL ALL MOUNTING FACILITIES ALL CENTER GROUPINGS IN |
| Input-Output Phase Relationship | SINGLE PHASE TO SINGLE PHASE ALL COMPONENTS |
| Mounting Method | THREADED HOLE(S) ALL GROUPINGS |
| Body Width | 2.380 INCHES MAXIMUM IN |
| Body Height | 2.380 INCHES MAXIMUM IN |
| Winding Function and Quantity | 4 PRIMARY AND 2 CONTROL AND 8 SECONDARY ALL COMPONENTS |
| Winding Shielding Method | INTERNAL SHIELD BROUGHT OUT TO TERMINAL FIRST COMPONENT |
| Winding Shielding Method | INTERNAL SHIELD BROUGHT OUT TO TERMINAL SECOND COMPONENT |
| Distance Between Mounting Facility Centers | 1.760 INCHES NOMINAL SECOND MOUNTING FACILITY ALL CENTER GROUPINGS IN |
| Distance Between Mounting Facility Centers | 4.260 INCHES NOMINAL FIRST MOUNTING FACILITY ALL CENTER GROUPINGS IN |
| Nominal Thread Size | 0.138 INCHES ALL GROUPINGS IN |
| Specification/standard Data | 09004-34931 MANUFACTURERS SOURCE CONTROL |
| Maximum Operating Temp | 70.0 CELSIUS DEGC |
| Body Length | 4.800 INCHES MAXIMUM IN |
| Winding Operating Current | 1.1 AMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY |
| Winding Operating Current | 1.15 AMPERES AC MAXIMUM SINGLE COMPONENT FOURTH SECONDARY |
| Winding Operating Current | 2.15 AMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY |
| Winding Operating Current | 3.3 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 10.0 KILOHERTZ MINIMUM AND 100.0 KILOHERTZ MAXIMUM THIRD COMPONENT |
| Frequency Rating | 50.0 KILOHERTZ NOMINAL FIRST COMPONENT |
| Frequency Rating | 50.0 KILOHERTZ NOMINAL SECOND COMPONENT |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 1.760 INCHES NOMINAL ALL MOUNTING FACILITIES ALL CENTER GROUPINGS IN |
| Winding Operating Voltage | 26.00 AC VOLTS MINIMUM AND 35.00 AC VOLTS MAXIMUM SINGLE COMPONENT FIRST PRIMARY |
| Winding Operating Voltage | 26.00 AC VOLTS MINIMUM AND 35.00 AC VOLTS MAXIMUM SINGLE COMPONENT SECOND PRIMARY |
| Terminal Type and Quantity | 22 TURRET |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) ALL GROUPINGS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
NSN 5950-01-369-9021 is a Transformer,power, manufactured by Transistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-01-369-9021 has 2 manufacturer part numbers on file: 3391 (Transistor Devices Inc Dba Fernwood Magnetics Div Div Circuitek Division), 34931 (Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit).
Key specifications for 3391: Mounting Facility Quantity: 4 ALL GROUPINGS; Inclosure Type: FULLY INCLOSED; Center to Center Distance Between Mounting Facilities Parallel to Length: 4.260 INCHES NOMINAL ALL MOUNTING FACILITIES ALL CENTER GROUPINGS IN; Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE ALL COMPONENTS. 29 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.