The Transformer,power, cataloged under National Stock Number 5950-01-139-0490, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Marine Electric Systems Inc. Government technical data includes 25 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-01-139-0490 |
| Primary Part Number | T-25878 |
| Item Name | Transformer,power |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Marine Electric Systems Inc |
| Status | ACTIVE |
| Mounting Facility Quantity | 4 SINGLE GROUP |
| Inclosure Type | FULLY INCLOSED |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 2.313 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Winding Power Rating | 0.02 VOLTS-AMPERES SINGLE COMPONENT ALL SECONDARY |
| Winding Power Rating | 1.0 VOLTS-AMPERES SINGLE COMPONENT SECOND PRIMARY |
| Winding Power Rating | 1.26 VOLTS-AMPERES SINGLE COMPONENT FIRST PRIMARY |
| Input-Output Phase Relationship | SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT |
| Mounting Method | THREADED STUD(S) SINGLE GROUP |
| Body Width | 2.625 INCHES NOMINAL IN |
| Body Height | 4.188 INCHES NOMINAL IN |
| Maximum Transformer Power Rating | 12.6 VOLT-AMPERE SINGLE COMPONENT |
| Winding Function and Quantity | 3 PRIMARY AND 16 SECONDARY SINGLE COMPONENT |
| Winding Shielding Method | INTERNAL SHIELD GROUNDED TO INCLOSURE SINGLE COMPONENT |
| Features Provided | COLOR CODED LEAD |
| Body Length | 3.063 INCHES NOMINAL IN |
| Winding Operating Current | 10.0 MILLIAMPERES AC NOMINAL SINGLE COMPONENT ALL SECONDARY |
| Winding Operating Current | 100.0 MILLIAMPERES AC NOMINAL SINGLE COMPONENT SECOND PRIMARY |
| Winding Operating Current | 200.0 MILLIAMPERES AC NOMINAL SINGLE COMPONENT FIRST PRIMARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 600.0 HERTZ NOMINAL SINGLE COMPONENT |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 1.875 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Winding Operating Voltage | 2.00 AC VOLTS NOMINAL SINGLE COMPONENT ALL SECONDARY |
| Winding Operating Voltage | 10.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND PRIMARY |
| Winding Operating Voltage | 6.30 AC VOLTS NOMINAL SINGLE COMPONENT FIRST PRIMARY |
| Terminal Type and Quantity | 39 WIRE LEAD |
| 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 |
|---|---|
| T-25878 PRIMARY | Marine Electric Systems Inc (USA) |
NSN 5950-01-139-0490 is a Transformer,power, manufactured by Marine Electric Systems Inc, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-01-139-0490 has 1 manufacturer part number on file: T-25878 (Marine Electric Systems Inc).
Key specifications for T-25878: Mounting Facility Quantity: 4 SINGLE GROUP; Inclosure Type: FULLY INCLOSED; Center to Center Distance Between Mounting Facilities Parallel to Length: 2.313 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Winding Power Rating: 0.02 VOLTS-AMPERES SINGLE COMPONENT ALL SECONDARY. 25 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.