The Transistor, cataloged under National Stock Number 5961-00-902-7970, 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 Osi Optoelectronics, Inc Dba Semicoa. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5961-00-902-7970 |
| Primary Part Number | 2N2599A |
| Item Name | Transistor |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Osi Optoelectronics, Inc Dba Semicoa |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 125.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 100.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN AND 7.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN |
| Overall Diameter | 0.230 INCHES MAXIMUM IN |
| Terminal Length | 0.500 INCHES MINIMUM IN |
| Mounting Method | TERMINAL |
| Semiconductor Material | SILICON |
| Internal Configuration | JUNCTION CONTACT |
| Features Provided | HERMETICALLY SEALED CASE |
| Current Rating Per Characteristic | 50.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC AND 5.00 MILLIAMPERES MAXIMUM EMITTER CURRENT, DC |
| Specification/standard Data | 80131-RELEASE4797 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION |
| Terminal Type and Quantity | 3 UNINSULATED WIRE LEAD |
| Electrode Internally-Electrically Connected to Case | COLLECTOR |
| Power Rating Per Characteristic | 400.0 MILLIWATTS MAXIMUM COLLECTOR 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 |
|---|---|
| 2N2599A | Osi Optoelectronics, Inc Dba Semicoa (USA) |
| 2N2599A | Pd&e Electronics, Llc (USA) |
| 2N2599A | Solid State Devices, Inc (USA) |
| 2N2599A | Semitronics Corp (USA) |
| Reference | Meaning |
|---|---|
| RELEASE4797 | 5/9 Secondary reference U.S. Government activity |
| 2N2599A | 3/9 Design control — primary reference U.S. Government activity |
| 2N2599A | 5/9 Secondary reference Solitron Devices, Inc. |
| 2N2599A | 5/9 Secondary reference Semiconductor Technology, Inc. Dba Semiconductor Technology Inc |
NSN 5961-00-902-7970 is a Transistor, manufactured by Osi Optoelectronics, Inc Dba Semicoa, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-00-902-7970 has 4 manufacturer part numbers on file: 2N2599A (Osi Optoelectronics, Inc Dba Semicoa), 2N2599A (Pd&e Electronics, Llc), 2N2599A (Solid State Devices, Inc), 2N2599A (Semitronics Corp).
1 possible match (shared part number, not a government interchangeability claim): 5961-00-960-3527. Verify interchangeability with system specifications before substitution.
Key specifications for 2N2599A: Voltage Rating in Volts Per Characteristic: 125.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 100.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN AND 7.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN; Overall Diameter: 0.230 INCHES MAXIMUM IN; Terminal Length: 0.500 INCHES MINIMUM IN; Mounting Method: TERMINAL. 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.