The Transformer,power, cataloged under National Stock Number 5950-01-149-2621, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Contraves Inc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-01-149-2621 |
| Primary Part Number | X3731 |
| Item Name | Transformer,power |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Contraves Inc |
| Status | ACTIVE |
| Input-Output Phase Relationship | THREE PHASE TO THREE PHASE SINGLE COMPONENT |
| Frequency Rating | 60.0 HERTZ NOMINAL SINGLE COMPONENT |
| Winding Operating Voltage | 6.00 AC KILOVOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| 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 |
|---|---|
| X3731 PRIMARY | Contraves Inc (USA) |
| Reference | Meaning |
|---|---|
| 5903869 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5950-01-149-2621 is a Transformer,power, manufactured by Contraves Inc, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-01-149-2621 has 1 manufacturer part number on file: X3731 (Contraves Inc).
Key specifications for X3731: Overall Height: 12.625 INCHES NOMINAL IN; Input-Output Phase Relationship: THREE PHASE TO THREE PHASE SINGLE COMPONENT; Overall Length: 15.250 INCHES NOMINAL IN; Overall Width: 8.625 INCHES NOMINAL IN. 3 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.