The Transistor, cataloged under National Stock Number 5961-01-104-4039, is classified within Federal Supply Class 5961 (Semiconductor Devices and Associated Hardware) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Keysight Technologies Inc. Government technical data includes 10 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5961-01-104-4039 |
| Primary Part Number | 1855-0091 |
| Item Name | Transistor |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Keysight Technologies Inc |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 30.0 MAXIMUM NOMINAL REGULATOR VOLTAGE |
| Overall Diameter | 0.250 INCHES NOMINAL IN |
| Terminal Length | 0.500 INCHES NOMINAL IN |
| Mounting Method | TERMINAL |
| Semiconductor Material | SILICON |
| Internal Configuration | JUNCTION CONTACT |
| Features Provided | HERMETICALLY SEALED CASE |
| Terminal Type and Quantity | 3 UNINSULATED WIRE LEAD |
| Terminal Circle Diameter | 0.165 INCHES NOMINAL IN |
| Power Rating Per Characteristic | 360.0 MILLIWATTS MAXIMUM TOTAL POWER DISSIPATION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1855-0091 PRIMARY | Keysight Technologies Inc (USA) |
| NS5141 | National Semiconductor Corporation (USA) |
| Reference | Meaning |
|---|---|
| 1855-0091 | 3/9 Design control — primary reference Keysight Technologies, Inc. |
| SFB8815 | 5/9 Secondary reference Texas Instruments Incorporated |
| ITS31251 | 5/9 Secondary reference Intersil Inc Sub of General Electric Co |
| SPF938 | 5/9 Secondary reference Freescale Semiconductor, Inc. |
| 1855-0091 | 5/9 Secondary reference Hewlett-Packard Company Dba HP |
NSN 5961-01-104-4039 is a Transistor, manufactured by Keysight Technologies Inc, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-01-104-4039 has 2 manufacturer part numbers on file: 1855-0091 (Keysight Technologies Inc), NS5141 (National Semiconductor Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5961-01-349-4297. Verify interchangeability with system specifications before substitution.
Key specifications for 1855-0091: Voltage Rating in Volts Per Characteristic: 30.0 MAXIMUM NOMINAL REGULATOR VOLTAGE; Overall Diameter: 0.250 INCHES NOMINAL IN; Terminal Length: 0.500 INCHES NOMINAL IN; Mounting Method: TERMINAL. 10 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.