The Transformer,power, cataloged under National Stock Number 5950-00-251-9971, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-00-251-9971 |
| Item Name | Transformer,power |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Status | ACTIVE |
| Mounting Facility Quantity | 4 SINGLE GROUP |
| Inclosure Type | OPEN |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 3.625 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Input-Output Phase Relationship | SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT |
| Mounting Method | FLANGE AND UNTHREADED HOLE(S) SINGLE GROUP |
| Body Width | 3.781 INCHES NOMINAL IN |
| Body Height | 6.875 INCHES NOMINAL IN |
| Mounting Hole Diameter | 0.203 INCHES NOMINAL SINGLE GROUP IN |
| Winding Function and Quantity | 2 PRIMARY AND 2 SECONDARY SINGLE COMPONENT |
| Body Length | 5.375 INCHES NOMINAL IN |
| Winding Operating Current | 10.0 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY |
| Winding Operating Current | 6.5 AMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 60.0 HERTZ NOMINAL SINGLE COMPONENT |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 2.719 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Winding Operating Voltage | 10.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY |
| Winding Operating Voltage | 11.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY |
| Winding Operating Voltage | 70.00 AC VOLTS NOMINAL AND 100.00 AC VOLTS NOMINAL SINGLE COMPONENT ALL PRIMARY |
| Terminal Type and Quantity | 12 THREADED STUD |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| K900566REV6 | 3/9 Design control — primary reference Rca Corp Distributor and Special Products Div |
| 30460 | 5/2 Secondary reference U.S. Government activity |
| K900566REV6 | 5/9 Secondary reference Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin |
NSN 5950-00-251-9971 is a Transformer,power, classified under FSC 5950, Coils and Transformers. Status: active.
6 possible matches (shared part number, not a government interchangeability claim): 5905-00-358-7581, 3110-01-270-7168, 3230-01-390-6840. Verify interchangeability with system specifications before substitution.
Key specifications for 5950-00-251-9971: Mounting Facility Quantity: 4 SINGLE GROUP; Inclosure Type: OPEN; Center to Center Distance Between Mounting Facilities Parallel to Length: 3.625 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT. 19 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.