The Transformer,power, cataloged under National Stock Number 5950-00-539-9538, 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 23 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5950-00-539-9538 |
| Primary Part Number | 18163 |
| Item Name | Transformer,power |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Robert M. Hadley Company, Inc. |
| Status | ACTIVE |
| Transformer Winding Connection Type | DELTA-WYE |
| Mounting Facility Quantity | 12 SINGLE GROUP |
| Inclosure Type | FULLY INCLOSED |
| Winding Power Rating | 3.1 KILOVOLT-AMPERES SINGLE COMPONENT SINGLE PRIMARY |
| Input-Output Phase Relationship | THREE PHASE TO THREE PHASE SINGLE COMPONENT |
| Mounting Method | THREADED HOLE(S) SINGLE GROUP |
| Body Width | 4.600 INCHES NOMINAL IN |
| Body Height | 2.750 INCHES MAXIMUM IN |
| Winding Function and Quantity | 1 PRIMARY AND 3 SECONDARY SINGLE COMPONENT |
| Nominal Thread Size | 0.164 INCHES SINGLE GROUP IN |
| Maximum Operating Temp | 95.0 CELSIUS DEGC |
| Body Length | 6.360 INCHES NOMINAL IN |
| Winding Operating Current | 13.9 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY |
| Winding Operating Current | 2.45 AMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY |
| Winding Operating Current | 816.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 60.0 HERTZ NOMINAL SINGLE COMPONENT |
| Winding Operating Voltage | 130.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY |
| Winding Operating Voltage | 200.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| Winding Operating Voltage | 9.50 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY |
| Winding Operating Voltage | 9.70 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY |
| Terminal Type and Quantity | 12 TAB, SOLDER LUG |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP |
| 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 |
|---|---|
| 18163 | Robert M. Hadley Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 984744-1C | 3/2 Design control — primary reference U.S. Government activity |
| 861129 | 5/2 Secondary reference U.S. Government activity |
| 311-13657-01 | 5/2 Secondary reference U.S. Government activity |
NSN 5950-00-539-9538 is a Transformer,power, manufactured by Robert M. Hadley Company, Inc., classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-539-9538 has 1 manufacturer part number on file: 18163 (Robert M. Hadley Company, Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 5826-00-701-4809, 1270-00-707-3701, 6130-01-512-0061. Verify interchangeability with system specifications before substitution.
Key specifications for 18163: Transformer Winding Connection Type: DELTA-WYE; Mounting Facility Quantity: 12 SINGLE GROUP; Inclosure Type: FULLY INCLOSED; Winding Power Rating: 3.1 KILOVOLT-AMPERES SINGLE COMPONENT SINGLE PRIMARY. 23 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.