The Transformer,power, cataloged under National Stock Number 5950-00-239-7547, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Robert M. Hadley Company, Inc.. Government technical data includes 29 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-00-239-7547 |
| Primary Part Number | 73C828-004 |
| Item Name | Transformer,power |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Robert M. Hadley Company, Inc. |
| Status | ACTIVE |
| Transformer Winding Connection Type | WYE-DELTA |
| Mounting Facility Quantity | 4 SECOND GROUP |
| Mounting Facility Quantity | 2 FIRST GROUP |
| Mounting Facility Quantity | 4 THIRD GROUP |
| Mounting Facility Quantity | 4 FOURTH GROUP |
| Inclosure Type | FULLY INCLOSED |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 1.552 INCHES MINIMUM AND 1.572 INCHES MAXIMUM SINGLE MOUNTING FACILITY FOURTH CENTER GROUP IN |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 3.109 INCHES MINIMUM AND 3.141 INCHES MAXIMUM SINGLE MOUNTING FACILITY SECOND CENTER GROUP IN |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 3.109 INCHES MINIMUM AND 3.141 INCHES MAXIMUM SINGLE MOUNTING FACILITY THIRD CENTER GROUP IN |
| Winding Power Rating | 1.6 VOLTS-AMPERES SINGLE COMPONENT THIRD SECONDARY |
| Winding Power Rating | 1.8 VOLTS-AMPERES SINGLE COMPONENT FOURTH SECONDARY |
| Winding Power Rating | 41.52 VOLTS-AMPERES SINGLE COMPONENT SECOND SECONDARY |
| Winding Power Rating | 5.46 VOLTS-AMPERES SINGLE COMPONENT FIRST SECONDARY |
| Input-Output Phase Relationship | THREE PHASE TO SINGLE PHASE AND THREE PHASE TO THREE PHASE SINGLE COMPONENT |
| Mounting Method | THREADED HOLE(S) ALL GROUPINGS |
| Body Width | 2.172 INCHES MINIMUM AND 2.204 INCHES MAXIMUM IN |
| Winding Function and Quantity | 2 PRIMARY AND 6 SECONDARY SINGLE COMPONENT |
| Winding Shielding Method | INTERNAL SHIELD BROUGHT OUT TO TERMINAL SINGLE COMPONENT |
| Distance Between Mounting Facility Centers | 1.109 INCHES MINIMUM AND 1.141 INCHES MAXIMUM SINGLE MOUNTING FACILITY FIRST CENTER GROUP IN |
| Nominal Thread Size | 0.138 INCHES FIRST GROUP IN |
| Nominal Thread Size | 0.112 INCHES SECOND GROUP IN |
| Nominal Thread Size | 0.112 INCHES THIRD GROUP IN |
| Nominal Thread Size | 0.164 INCHES FOURTH GROUP IN |
| Maximum Operating Temp | 170.0 CELSIUS DEGC |
| Body Length | 3.859 INCHES MINIMUM AND 3.891 INCHES MAXIMUM IN |
| Winding Operating Current | 40.0 MILLIAMPERES AC NOMINAL SINGLE COMPONENT SECOND SECONDARY |
| Winding Operating Current | 40.0 MILLIAMPERES AC NOMINAL SINGLE COMPONENT THIRD SECONDARY |
| Winding Operating Current | 600.0 MILLIAMPERES AC NOMINAL SINGLE COMPONENT FOURTH SECONDARY |
| Winding Operating Current | 84.0 MILLIAMPERES AC NOMINAL SINGLE COMPONENT FIRST SECONDARY |
| 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 |
|---|---|
| 73C828-004 | Robert M. Hadley Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 73C828-004 | 3/9 Design control — primary reference Ail Systems Inc Sub of Eaton Corp |
| 73C828-004 | 5/2 Secondary reference U.S. Government activity |
NSN 5950-00-239-7547 is a Transformer,power, manufactured by Robert M. Hadley Company, Inc., classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-239-7547 has 1 manufacturer part number on file: 73C828-004 (Robert M. Hadley Company, Inc.).
Key specifications for 73C828-004: Overall Height: 1.859 INCHES MINIMUM AND 1.891 INCHES MAXIMUM IN; Transformer Winding Connection Type: WYE-DELTA; Mounting Facility Quantity: 4 SECOND GROUP; Mounting Facility Quantity: 2 FIRST GROUP. 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.