The Transformer,power, cataloged under National Stock Number 5950-00-645-1803, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Ward Leonard Ct Llc. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 21 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-00-645-1803 |
| Primary Part Number | 16535-25-21 |
| Item Name | Transformer,power |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Ward Leonard Ct Llc |
| Status | ACTIVE |
| Mounting Facility Quantity | 4 SINGLE GROUP |
| Inclosure Type | OPEN |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 3.750 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 | 4.000 INCHES NOMINAL IN |
| Body Height | 3.875 INCHES NOMINAL IN |
| Criticality Code Justification | FEAT |
| Winding Function and Quantity | 1 PRIMARY AND 2 SECONDARY SINGLE COMPONENT |
| Body Length | 4.500 INCHES NOMINAL IN |
| Winding Operating Current | 1.3 AMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 60.0 HERTZ NOMINAL SINGLE COMPONENT |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 3.125 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Winding Operating Voltage | 120.00 AC VOLTS NOMINAL SINGLE COMPONENT ALL SECONDARY |
| Winding Operating Voltage | 120.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| Terminal Type and Quantity | 6 TAB, SOLDER LUG |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 16535-25-21 PRIMARY | Ward Leonard Ct Llc (USA) |
| C17732 | Electronic Transformer Corp Div Electronic Transformer Corporation (USA) |
| 4047-381PC9 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 319-6505-1183915ALT1PC11 | 3/2 Design control — primary reference U.S. Government activity |
| 366-3100-1425516LINE138SH2 | 3/2 Design control — primary reference U.S. Government activity |
| 574-6504-810755R | 3/2 Design control — primary reference U.S. Government activity |
| T1-6504-1286034REVCPC38 | 3/2 Design control — primary reference U.S. Government activity |
| 319-3101-1183779LINE132 | 3/2 Design control — primary reference U.S. Government activity |
| 9867-085X4PC96 | 3/2 Design control — primary reference U.S. Government activity |
| 3667-30REVBPC31 | 3/2 Design control — primary reference U.S. Government activity |
| 340-6504-1002307PC48 | 3/2 Design control — primary reference U.S. Government activity |
| 320-6505-798937PC11 | 3/2 Design control — primary reference U.S. Government activity |
| 25QPC165352521 | 5/9 Secondary reference Milling Precision Tool Corp Dba Milling Precision Acquisition Co |
| 4267-42REVAPC31 | 5/2 Secondary reference U.S. Government activity |
| 208-14-2PC40 | 5/9 Secondary reference Ingalls Iron Works Co Marine Division |
| 3767-30REVAPC31 | 3/2 Design control — primary reference U.S. Government activity |
| 4195-02LINE138SH2 | 5/9 Secondary reference U.S. Government activity |
| 571-6504-1301658REVBPC31 | 3/2 Design control — primary reference U.S. Government activity |
| K1-6504-1001395ALT1PC11 | 3/2 Design control — primary reference U.S. Government activity |
| 240-6504-1035779REVAPC48 | 3/2 Design control — primary reference U.S. Government activity |
| 580-401-1699211 | 5/2 Secondary reference U.S. Government activity |
| 598-401-1892607REVAPC96 | 3/2 Design control — primary reference U.S. Government activity |
| K1-3101-1001284ALT2LINE199 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5950-00-645-1803 is a Transformer,power, manufactured by Ward Leonard Ct Llc, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-645-1803 has 3 manufacturer part numbers on file: 16535-25-21 (Ward Leonard Ct Llc), C17732 (Electronic Transformer Corp Div Electronic Transformer Corporation), 4047-381PC9 (Huntington Ingalls Inc Div Newport News Shipbuilding).
1 possible match (shared part number, not a government interchangeability claim): 5995-01-266-7172. Verify interchangeability with system specifications before substitution.
Key specifications for 16535-25-21: Mounting Facility Quantity: 4 SINGLE GROUP; Inclosure Type: OPEN; Center to Center Distance Between Mounting Facilities Parallel to Length: 3.750 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT. 17 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.