The Transformer,power, cataloged under National Stock Number 5950-00-274-9788, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Sora Power Inc. Dba Sigma Division. Government technical data includes 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5950-00-274-9788 |
| Primary Part Number | 11657 |
| Item Name | Transformer,power |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Sora Power Inc. Dba Sigma Division |
| Status | ACTIVE |
| Inclosure Type | FULLY INCLOSED |
| Input-Output Phase Relationship | SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT |
| Mounting Method | TERMINAL SINGLE GROUP |
| Body Width | 0.690 INCHES NOMINAL IN |
| Body Height | 0.450 INCHES MAXIMUM IN |
| Winding Function and Quantity | 1 PRIMARY AND 2 SECONDARY SINGLE COMPONENT |
| Maximum Operating Temp | 105.0 CELSIUS DEGC |
| Body Length | 0.690 INCHES NOMINAL IN |
| Winding Operating Current | 150.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 300.0 KILOHERTZ MINIMUM AND 1.7 MEGAHERTZ MAXIMUM SINGLE COMPONENT |
| Winding Operating Voltage | 28.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| Winding Operating Voltage | 28.00 AC VOLTS NOMINAL SINGLE COMPONENT ALL SECONDARY |
| Terminal Type and Quantity | 8 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 |
|---|---|
| 11657 | Sora Power Inc. Dba Sigma Division (USA) |
| Reference | Meaning |
|---|---|
| 310-18294-01 | 5/2 Secondary reference U.S. Government activity |
| 984736-1B | 5/2 Secondary reference U.S. Government activity |
| 861042 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5950-00-274-9788 is a Transformer,power, manufactured by Sora Power Inc. Dba Sigma Division, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-274-9788 has 1 manufacturer part number on file: 11657 (Sora Power Inc. Dba Sigma Division).
2 possible matches (shared part number, not a government interchangeability claim): 5340-00-701-7395, 9540-00-838-1769. Verify interchangeability with system specifications before substitution.
Key specifications for 11657: Inclosure Type: FULLY INCLOSED; Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT; Mounting Method: TERMINAL SINGLE GROUP; Body Width: 0.690 INCHES NOMINAL IN. 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.