NSN 5961-01-564-3729 — this item is cataloged by the U.S. Government under National Stock Number 5961-01-564-3729. Manufacturer of record part number: KST5550.
Also searched as5961-01-564-3729 ·
5961015643729 ·
NIIN 015643729 ·
01-564-3729 ·
FSC 5961 Semiconductor Devices and Associated Hardware · CAGE 7D893 · KST5550
Voltage Rating in Volts Per Characteristic: 160.0 NOMINAL COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND 140.0 NOMINAL COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN AND 6.0 NOMINAL EMITTER TO BASE VOLTAGE, STATIC, COLLECTOR OPEN
Mounting Method: TERMINAL
Semiconductor Material: SILICON
Current Rating Per Characteristic: 600.00 MILLIAMPERES NOMINAL COLLECTOR CURRENT, DC
Terminal Type and Quantity: 3 TAB, SOLDER LUG
Power Rating Per Characteristic: 350.0 MILLIWATTS NOMINAL COLLECTOR POWER DISSIPATION
1 manufacturer part number on file
Identification
NSN: 5961-01-564-3729
NIIN: 015643729
FSC: 5961 — Semiconductor Devices and Associated Hardware
FSG: 59 — Electrical and Electronic Equipment Components
Primary part number: KST5550
Manufacturer: Fairchild Semiconductor Corporation
General Description
The Transistor, cataloged under National Stock Number 5961-01-564-3729, 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 Fairchild Semiconductor Corporation. Government technical data includes 6 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. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5961-01-564-3729
Primary Part Number
KST5550
Item Name
Transistor
FSC / FSG
5961 / 59 — Semiconductor Devices and Associated Hardware
Manufacturer
Fairchild Semiconductor Corporation
Status
ACTIVE
Voltage Rating in Volts Per Characteristic
160.0 NOMINAL COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND 140.0 NOMINAL COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN AND 6.0 NOMINAL EMITTER TO BASE VOLTAGE, STATIC, COLLECTOR OPEN
Mounting Method
TERMINAL
Semiconductor Material
SILICON
Current Rating Per Characteristic
600.00 MILLIAMPERES NOMINAL COLLECTOR CURRENT, DC
Terminal Type and Quantity
3 TAB, SOLDER LUG
Power Rating Per Characteristic
350.0 MILLIWATTS NOMINAL COLLECTOR POWER DISSIPATION
Other items in FSC 5961 — Semiconductor Devices and Associated Hardware
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5961-00-000-0150
RECTIFIER,SEMICONDUCTOR DEVICE,U
5961-00-000-4541
5961-00-000-4541 · Item name not on file
5961-00-000-5400
5961-00-000-5400 · Item name not on file
5961-00-000-7614
5961-00-000-7614 · Item name not on file
5961-00-000-8760
5961-00-000-8760 · Item name not on file
5961-00-001-1352
5961-00-001-1352 · Item name not on file
5961-00-001-2624
5961-00-001-2624 · Item name not on file
5961-00-001-2978
SEMICONDUCTOR DEVICE,DIODE
Frequently Asked Questions
What is NSN 5961-01-564-3729?
NSN 5961-01-564-3729 is a Transistor, manufactured by Fairchild Semiconductor Corporation, classified under FSC 5961, Semiconductor Devices and Associated Hardware. Status: active.
What part numbers are listed for NSN 5961-01-564-3729?
NSN 5961-01-564-3729 has 1 manufacturer part number on file: KST5550 (Fairchild Semiconductor Corporation).
What are the specifications of KST5550?
Key specifications for KST5550: Overall Height: 0.970 INCHES NOMINAL IN; Voltage Rating in Volts Per Characteristic: 160.0 NOMINAL COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND 140.0 NOMINAL COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN AND 6.0 NOMINAL EMITTER TO BASE VOLTAGE, STATIC, COLLECTOR OPEN; Mounting Method: TERMINAL; Semiconductor Material: SILICON. 6 specifications are documented in the U.S. Government catalog.
Is NSN 5961-01-564-3729 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.