The Transformer,power, cataloged under National Stock Number 5950-00-949-4105, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5950-00-949-4105 |
| Primary Part Number | B191 |
| Item Name | Transformer,power |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc |
| Status | ACTIVE |
| Mounting Facility Quantity | 4 SINGLE GROUP |
| Inclosure Type | HERMETICALLY SEALED |
| Center to Center Distance Between Mounting Facilities Parallel to Length | 1.620 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Input-Output Phase Relationship | SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT |
| Mounting Method | FLANGE AND SLOT SINGLE GROUP |
| Body Width | 2.000 INCHES NOMINAL IN |
| Body Height | 2.350 INCHES NOMINAL IN |
| Winding Function and Quantity | 2 PRIMARY AND 3 SECONDARY SINGLE COMPONENT |
| Body Length | 2.000 INCHES NOMINAL IN |
| Winding Operating Current | 600.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY |
| Winding Operating Current | 1.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT THIRD SECONDARY |
| Winding Operating Current | 40.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 50.0 HERTZ MINIMUM AND 400.0 HERTZ MAXIMUM SINGLE COMPONENT |
| Center to Center Distance Between Mounting Facilities Parallel to Width | 1.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Winding Operating Voltage | 6.30 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY |
| Winding Operating Voltage | 115.00 AC VOLTS NOMINAL SINGLE COMPONENT ALL PRIMARY |
| Winding Operating Voltage | 142.00 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY |
| Winding Operating Voltage | 532.00 AC VOLTS NOMINAL SINGLE COMPONENT THIRD SECONDARY |
| Terminal Type and Quantity | 10 STANDOFF INSULATOR |
| Mounting Slot Width | 0.156 INCHES NOMINAL SINGLE GROUP IN |
| 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 |
|---|---|
| 336-073-003 | L3harris Interstate Electronics Corporation (USA) |
| B191 PRIMARY | Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc (USA) |
| Reference | Meaning |
|---|---|
| B191 | 3/9 Design control — primary reference Aiken Advanced Systems Inc a Div of Amstar Technical Products Inc an Affil of Amstar Corp |
NSN 5950-00-949-4105 is a Transformer,power, manufactured by Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-949-4105 has 2 manufacturer part numbers on file: 336-073-003 (L3harris Interstate Electronics Corporation), B191 (Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-004-4897. Verify interchangeability with system specifications before substitution.
Key specifications for B191: Mounting Facility Quantity: 4 SINGLE GROUP; Inclosure Type: HERMETICALLY SEALED; Center to Center Distance Between Mounting Facilities Parallel to Length: 1.620 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT. 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.