The Transistor, cataloged under National Stock Number 5961-00-045-8625, 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 Semitronics Corp. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5961-00-045-8625 |
| Primary Part Number | 577R139H01 |
| Item Name | Transistor |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Semitronics Corp |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 100.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 60.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR TO EMITTER, SUSTAINED AND 15.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN |
| Maximum Operating Temp Per Measurement Point | 200.0 CELSIUS AMBIENT AIR DEGC |
| Overall Diameter | 0.210 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN |
| Terminal Length | 0.500 INCHES MINIMUM IN |
| Mounting Method | TERMINAL |
| Semiconductor Material | SILICON |
| Internal Configuration | JUNCTION CONTACT-DARLINGTON CONNECTED |
| Features Provided | HERMETICALLY SEALED CASE |
| Function for Which Designed | AMPLIFIER |
| Test Data Document | 97942-577R139 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING) |
| Terminal Type and Quantity | 4 UNINSULATED WIRE LEAD |
| Terminal Circle Diameter | 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Electrode Internally-Electrically Connected to Case | COLLECTOR |
| Power Rating Per Characteristic | 1.8 WATTS 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 |
|---|---|
| 577R139H01 | Semitronics Corp (USA) |
| Reference | Meaning |
|---|---|
| HP8521 | 5/9 Secondary reference Fairchild Semiconductor Corp |
| 4JX12B623 | 5/9 Secondary reference General Electric Co Semi-Conductor Products Dept |
| SA2261 | 5/9 Secondary reference Telcom Semiconductor Inc |
| SD1768H | 5/9 Secondary reference Freescale Semiconductor, Inc. |
| 577R139H01 | 3/2 Design control — primary reference U.S. Government activity |
| SA2246 | 5/9 Secondary reference Telcom Semiconductor Inc |
| 2W998 | C/1 Advisory reference — outside the item-of-supply concept Fairchild Semiconductor Corp |
NSN 5961-00-045-8625 is a Transistor, manufactured by Semitronics Corp, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-00-045-8625 has 1 manufacturer part number on file: 577R139H01 (Semitronics Corp).
Key specifications for 577R139H01: Voltage Rating in Volts Per Characteristic: 100.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 60.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR TO EMITTER, SUSTAINED AND 15.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN; Maximum Operating Temp Per Measurement Point: 200.0 CELSIUS AMBIENT AIR DEGC; Overall Diameter: 0.210 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN; Terminal Length: 0.500 INCHES MINIMUM IN. 14 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.