The Transistor, cataloged under National Stock Number 5961-01-102-8557, is classified within Federal Supply Class 5961 (Semiconductor Devices and Associated Hardware) of the Electrical and Electronic Equipment Components group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5961-01-102-8557 |
| Item Name | Transistor |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | 50.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 50.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, WITH SPECIFIED RESISTANCE BETWEEN BASE AND EMITTER AND 4.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN |
| Maximum Operating Temp Per Measurement Point | 200.0 CELSIUS AMBIENT AIR DEGC |
| Overall Diameter | 0.800 INCHES NOMINAL IN |
| Precious Material | GOLD |
| Mounting Method | PRESS FIT |
| Semiconductor Material | SILICON |
| Internal Configuration | JUNCTION CONTACT |
| Features Provided | HERMETICALLY SEALED CASE |
| Current Rating Per Characteristic | 0.25 AMPERES MAXIMUM COLLECTOR CURRENT, DC |
| Precious Material and Location | EXTERNAL SURFACES GOLD |
| Terminal Type and Quantity | 4 FLANGE |
| Power Rating Per Characteristic | 1.25 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 |
| Reference | Meaning |
|---|---|
| MRW2001 | 5/9 Secondary reference Freescale Semiconductor, Inc. |
| 129212 | 3/2 Design control — primary reference U.S. Government activity |
| TRW2001 | C/1 Advisory reference — outside the item-of-supply concept Trw Electronics and Defense Sector Rf Devices |
| 129212-1 | 5/2 Secondary reference U.S. Government activity |
NSN 5961-01-102-8557 is a Transistor, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5961-01-169-5098. Verify interchangeability with system specifications before substitution.
Key specifications for 5961-01-102-8557: Voltage Rating in Volts Per Characteristic: 50.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 50.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, WITH SPECIFIED RESISTANCE BETWEEN BASE AND EMITTER AND 4.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN; Maximum Operating Temp Per Measurement Point: 200.0 CELSIUS AMBIENT AIR DEGC; Overall Diameter: 0.800 INCHES NOMINAL IN; Precious Material: GOLD. 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.