The Transformer,power, cataloged under National Stock Number 5950-01-172-8564, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Ems Development Corporation. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-01-172-8564 |
| Primary Part Number | 258S030-1 |
| Item Name | Transformer,power |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Ems Development Corporation |
| Status | ACTIVE |
| Mounting Facility Quantity | 4 SINGLE GROUP |
| Inclosure Type | FULLY INCLOSED |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 4.370 INCHES MINIMUM AND 4.380 INCHES MAXIMUM SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Input-Output Phase Relationship | SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT |
| Mounting Method | UNTHREADED HOLE(S) SINGLE GROUP |
| Body Width | 4.330 INCHES MINIMUM AND 4.430 INCHES MAXIMUM IN |
| Body Height | 4.540 INCHES MAXIMUM IN |
| Mounting Hole Diameter | 0.280 INCHES MINIMUM AND 0.288 INCHES MAXIMUM SINGLE GROUP IN |
| Winding Function and Quantity | 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT |
| Winding Shielding Method | INTERNAL SHIELD BROUGHT OUT TO TERMINAL SINGLE COMPONENT |
| Maximum Operating Temp | 130.0 CELSIUS DEGC |
| Body Length | 5.200 INCHES MINIMUM AND 5.300 INCHES MAXIMUM IN |
| Winding Operating Current | 6.0 AMPERES AC MAXIMUM SINGLE COMPONENT SINGLE SECONDARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 60.0 HERTZ NOMINAL SINGLE COMPONENT |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 3.495 INCHES MINIMUM AND 3.505 INCHES MAXIMUM SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Winding Operating Voltage | 440.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| Winding Operating Voltage | 6.00 AC VOLTS NOMINAL AND 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE SECONDARY |
| 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 | X |
| Part Number | Manufacturer |
|---|---|
| 258S030-1 | Standex Electronics, Inc. (USA) |
| 258S030-1 | Digatron Power Electronics Inc (USA) |
| B83A | B G Laboratories Inc. (USA) |
| 258S030-1 PRIMARY | Ems Development Corporation (USA) |
| 258S030-1 | Magnetika Inc (USA) |
| 258S030-1 | Edko Electronics (USA) |
| Reference | Meaning |
|---|---|
| 258S030-1 | 5/9 Secondary reference U.S. Government activity |
| 258S030-1 | 5/9 Secondary reference Microtran Co Inc |
NSN 5950-01-172-8564 is a Transformer,power, manufactured by Ems Development Corporation, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-01-172-8564 has 6 manufacturer part numbers on file: 258S030-1 (Standex Electronics, Inc.), 258S030-1 (Digatron Power Electronics Inc), B83A (B G Laboratories Inc.), 258S030-1 (Ems Development Corporation), 258S030-1 (Magnetika Inc) and 1 more.
Key specifications for 258S030-1: Mounting Facility Quantity: 4 SINGLE GROUP; Inclosure Type: FULLY INCLOSED; Center to Center Distance Between Mounting Facilities Parallel to Length: 4.370 INCHES MINIMUM AND 4.380 INCHES MAXIMUM SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT. 19 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.