The Transistor, cataloged under National Stock Number 5961-00-754-9729, 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 Silicon Transistor Corporation Dba Same. Government technical data includes 15 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5961-00-754-9729 |
| Primary Part Number | 2N278 |
| Item Name | Transistor |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Silicon Transistor Corporation Dba Same |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 2.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN |
| Maximum Operating Temp Per Measurement Point | 95.0 CELSIUS JUNCTION DEGC |
| Mounting Facility Quantity | 1 |
| Overall Diameter | 1.250 INCHES MAXIMUM IN |
| Mounting Method | THREADED STUD(S) |
| Semiconductor Material | GERMANIUM |
| Internal Configuration | JUNCTION CONTACT |
| Features Provided | HERMETICALLY SEALED CASE |
| Nominal Thread Size | 0.190 INCHES IN |
| Current Rating Per Characteristic | 12.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC |
| Specification/standard Data | 80131-RELEASE1805 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION |
| Material | GLASS ENCLOSURE |
| Terminal Type and Quantity | 2 TAB, SOLDER LUG AND 1 THREADED STUD |
| Thread Series Designator | UNF |
| Electrode Internally-Electrically Connected to Case | COLLECTOR |
| 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 |
|---|---|
| 2N278 | Silicon Transistor Corporation Dba Same (USA) |
| 2N278 | Solitron Devices, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 2N278 | 5/9 Secondary reference Electronic Transistors Corp |
| 2N278 | 3/9 Design control — primary reference U.S. Government activity |
| 2N278 | 5/9 Secondary reference Csr Industries Inc |
| RELEASE1805 | 5/9 Secondary reference U.S. Government activity |
| 2N278 | 5/9 Secondary reference General Motors Corp Delco Electronics Div |
NSN 5961-00-754-9729 is a Transistor, manufactured by Silicon Transistor Corporation Dba Same, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-00-754-9729 has 2 manufacturer part numbers on file: 2N278 (Silicon Transistor Corporation Dba Same), 2N278 (Solitron Devices, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5961-00-860-2074. Verify interchangeability with system specifications before substitution.
Key specifications for 2N278: Voltage Rating in Volts Per Characteristic: 2.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN; Maximum Operating Temp Per Measurement Point: 95.0 CELSIUS JUNCTION DEGC; Mounting Facility Quantity: 1; Overall Diameter: 1.250 INCHES MAXIMUM IN. 15 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.