The Transformer,power, cataloged under National Stock Number 5950-01-313-1024, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5950-01-313-1024 |
| Primary Part Number | 77C721052P1 |
| Item Name | Transformer,power |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Transformer Winding Connection Type | WYE-WYE |
| Mounting Facility Quantity | 4 SINGLE GROUP |
| Inclosure Type | FULLY INCLOSED |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 3.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Winding Power Rating | 3.0 KILOVOLT-AMPERES SINGLE COMPONENT ALL PRIMARY OUTPUT |
| Input-Output Phase Relationship | THREE PHASE TO THREE PHASE SINGLE COMPONENT |
| Mounting Method | FLANGE AND UNTHREADED HOLE(S) SINGLE GROUP |
| Mounting Hole Diameter | 0.266 INCHES NOMINAL SINGLE GROUP IN |
| Winding Function and Quantity | 1 PRIMARY, FIXED AUTOTRANSFORMER TYPE SINGLE COMPONENT |
| Maximum Operating Temp | 65.0 CELSIUS DEGC |
| Winding Operating Current | 11.4 AMPERES AC MAXIMUM SINGLE COMPONENT THIRD PRIMARY OUTPUT |
| Winding Operating Current | 11.9 AMPERES AC MAXIMUM SINGLE COMPONENT SECOND PRIMARY OUTPUT |
| Winding Operating Current | 12.5 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST PRIMARY OUTPUT |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 400.0 HERTZ NOMINAL SINGLE COMPONENT |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 3.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Winding Operating Voltage | 120.00 AC VOLTS NOMINAL OR 208.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY INPUT |
| Winding Operating Voltage | 240.00 AC VOLTS NOMINAL SINGLE COMPONENT FIRST PRIMARY OUTPUT |
| Winding Operating Voltage | 252.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND PRIMARY OUTPUT |
| Winding Operating Voltage | 264.00 AC VOLTS NOMINAL SINGLE COMPONENT THIRD PRIMARY OUTPUT |
| Terminal Type and Quantity | 13 SOLDER STUD |
| 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 |
|---|---|
| 77C721052P1 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| GE-3P155 | Espey Mfg and Electronics Corp (USA) |
| Reference | Meaning |
|---|---|
| GE-3P155 | 5/9 Secondary reference U.S. Government activity |
NSN 5950-01-313-1024 is a Transformer,power, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-01-313-1024 has 2 manufacturer part numbers on file: 77C721052P1 (Lockheed Martin Corporation Div Rms), GE-3P155 (Espey Mfg and Electronics Corp).
Key specifications for 77C721052P1: Overall Height: 5.620 INCHES MAXIMUM IN; Transformer Winding Connection Type: WYE-WYE; Mounting Facility Quantity: 4 SINGLE GROUP; Inclosure Type: FULLY INCLOSED. 21 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.