The Transistor, cataloged under National Stock Number 5961-01-167-5575, 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 Smiths Aerospace, Inc., Electronic Systems-Grand Rapids. Government technical data includes 10 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. 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 | 5961-01-167-5575 |
| Primary Part Number | 21953 |
| Item Name | Transistor |
| FSC / FSG | 5961 / 59 — Semiconductor Devices and Associated Hardware |
| Manufacturer | Smiths Aerospace, Inc., Electronic Systems-Grand Rapids |
| Status | ACTIVE |
| Voltage Rating in Volts Per Characteristic | -60.0 NOMINAL COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN |
| Overall Diameter | 0.209 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN |
| Special Test Features | TESTED PER BASE TEN SYSTEMS DWG 21953 |
| Terminal Length | 0.500 INCHES MINIMUM IN |
| Mounting Method | TERMINAL |
| Semiconductor Material | SILICON |
| Internal Configuration | JUNCTION CONTACT |
| Current Rating Per Characteristic | 600.00 MILLIAMPERES NOMINAL COLLECTOR CURRENT, DC |
| Terminal Type and Quantity | 3 UNINSULATED WIRE LEAD |
| Power Rating Per Characteristic | 400.0 MILLIWATTS NOMINAL TOTAL POWER DISSIPATION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 21953 PRIMARY | Smiths Aerospace, Inc., Electronic Systems-Grand Rapids (USA) |
NSN 5961-01-167-5575 is a Transistor, manufactured by Smiths Aerospace, Inc., Electronic Systems-Grand Rapids, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
NSN 5961-01-167-5575 has 1 manufacturer part number on file: 21953 (Smiths Aerospace, Inc., Electronic Systems-Grand Rapids).
2 possible matches (shared part number, not a government interchangeability claim): 4720-01-533-5012, 4820-01-595-5446. Verify interchangeability with system specifications before substitution.
Key specifications for 21953: Voltage Rating in Volts Per Characteristic: -60.0 NOMINAL COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN; Overall Diameter: 0.209 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN; Special Test Features: TESTED PER BASE TEN SYSTEMS DWG 21953; Terminal Length: 0.500 INCHES MINIMUM IN. 10 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.
NSN 5961-01-167-5575 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.