The Semiconductor Device,diode, cataloged under National Stock Number 5961-00-121-9891, 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 Siemens S.a.s. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 13 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5961-00-121-9891 |
| Primary Part Number | 1N940A |
| Item Name | Semiconductor Device,diode |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Siemens S.a.s |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 9.0 MAXIMUM NOMINAL REGULATOR VOLTAGE |
| Joint Electronic Device Engineering Council/jedec/case Outline Designation | DO-7 |
| Overall Diameter | 0.085 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN |
| Terminal Length | 1.000 INCHES MINIMUM IN |
| Mounting Method | TERMINAL |
| Features Provided | HERMETICALLY SEALED CASE |
| Current Rating Per Characteristic | 7.50 MILLIAMPERES MAXIMUM MAXIMUM REVERSE SURGE CURRENT |
| Specification/standard Data | 80131-RELEASE3859 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION |
| Material | SILICON SEMICONDUCTOR |
| Material | GLASS ENCLOSURE |
| Terminal Type and Quantity | 2 UNINSULATED WIRE LEAD |
| Power Rating Per Characteristic | 500.0 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 |
|---|---|
| 1N940A | Siemens S.a.s (FRA) |
| 14011141-4 | Safran Electronics & Defense (FRA) |
| 1N940A | International Diode Corp (USA) |
| 1N940A | Semitronics Corp (USA) |
| Reference | Meaning |
|---|---|
| 1N940A | C/1 Advisory reference — outside the item-of-supply concept On Semiconductor Corporation |
| RELEASE3859 | 5/9 Secondary reference U.S. Government activity |
| 1N940A | 3/9 Design control — primary reference U.S. Government activity |
| 1N940A | 5/9 Secondary reference Gilbert Engineering Co Inc/incon Sub of Transitron Electronic Corp |
| 1N940A | 5/9 Secondary reference Freescale Semiconductor, Inc. |
| 1N940A | 5/9 Secondary reference C O D I Corp Dba Codi Semiconductor Inc |
| 1N940A | 5/9 Secondary reference Burns and Towne Inc |
| 1N940A | 5/9 Secondary reference Microsemi Corporation |
| 1N940A | 5/9 Secondary reference U.S. Government activity |
| 1N940A | 5/9 Secondary reference General Semiconductor Industries Inc |
| 1N940A | 5/9 Secondary reference Semiconductor Devices Inc |
| 14011141-4 | 5/9 Secondary reference Safran |
| 1N940A | 5/9 Secondary reference Microsemi Corp.-Scottsdale Dba Microsemi |
NSN 5961-00-121-9891 is a Semiconductor Device,diode, manufactured by Siemens S.a.s, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-00-121-9891 has 4 manufacturer part numbers on file: 1N940A (Siemens S.a.s), 14011141-4 (Safran Electronics & Defense), 1N940A (International Diode Corp), 1N940A (Semitronics Corp).
2 possible matches (shared part number, not a government interchangeability claim): 5961-00-901-7406, 5961-01-014-2854. Verify interchangeability with system specifications before substitution.
Key specifications for 1N940A: Voltage Rating in Volts Per Characteristic: 9.0 MAXIMUM NOMINAL REGULATOR VOLTAGE; Joint Electronic Device Engineering Council/jedec/case Outline Designation: DO-7; Overall Diameter: 0.085 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN; Terminal Length: 1.000 INCHES MINIMUM IN. 12 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.