PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2N6659Transistor

Siliconix Incorporated Div Siliconix · NSN 5961-01-145-7255 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-01-145-7255 — this item is cataloged by the U.S. Government under National Stock Number 5961-01-145-7255. Primary manufacturer part number: 2N6659.
Features
  • Transistor — FSC 5961
  • Joint Electronic Device Engineering Council/jedec/case Outline Designation: TO-39
  • Terminal Type and Quantity: 3 UNINSULATED WIRE LEAD
  • Mounting Method: TERMINAL
  • Features Provided: HERMETICALLY SEALED CASE
  • Internal Configuration: FIELD EFFECT
  • Voltage Rating in Volts Per Characteristic: 35.0 MAXIMUM BREAKDOWN VOLTAGE, DRAIN-TO-SOURCE, WITH ALL OTHER TERMINALS SHORT-CIRCUITED TO SOURCE AND 15.0 MAXIMUM BREAKDOWN VOLTAGE, GATE-TO-SOURCE, WITH ALL OTHER TERMINALS SHORT-CIRCUITED TO SOURCE
  • Terminal Circle Diameter: 0.210 INCHES MAXIMUM IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transistor, cataloged under National Stock Number 5961-01-145-7255, is classified within Federal Supply Class 5961 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Siliconix Incorporated Div Siliconix. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-01-145-7255
Primary Part Number2N6659
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerSiliconix Incorporated Div Siliconix
StatusACTIVE
Joint Electronic Device Engineering Council/jedec/case Outline DesignationTO-39
Terminal Type and Quantity3 UNINSULATED WIRE LEAD
Mounting MethodTERMINAL
Features ProvidedHERMETICALLY SEALED CASE
Internal ConfigurationFIELD EFFECT
Voltage Rating in Volts Per Characteristic35.0 MAXIMUM BREAKDOWN VOLTAGE, DRAIN-TO-SOURCE, WITH ALL OTHER TERMINALS SHORT-CIRCUITED TO SOURCE AND 15.0 MAXIMUM BREAKDOWN VOLTAGE, GATE-TO-SOURCE, WITH ALL OTHER TERMINALS SHORT-CIRCUITED TO SOURCE
Terminal Circle Diameter0.210 INCHES MAXIMUM IN
Current Rating Per Characteristic2.00 AMPERES MAXIMUM DRAIN CURRENT
Power Rating Per Characteristic6.2 WATTS MAXIMUM TOTAL POWER DISSIPATION
Terminal Length0.500 INCHES MINIMUM IN
Specification/standard Data80131-RELEASE6675 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
Semiconductor MaterialSILICON
Overall Diameter0.370 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5962-00-248-5241LM109H INTERCHANGEABLE
Microcircuit,linear
National Semiconductor Corporation
5961-01-081-3429 INTERCHANGEABLE
Transistor
5961-01-096-8159 INTERCHANGEABLE
Transistor
5961-01-299-8456T235A331-2 INTERCHANGEABLE
Transistor
Telephonics Corp
Cross-Reference Index
Part NumberManufacturer
RELEASE 6675 Electronic Industries Association
019-005543-001 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple (USA)
2N6659 Electronic Industries Association
6L.5501.101.00-280592 Leonardo Germany Gmbh (DEU)
2N6659 PRIMARY Siliconix Incorporated Div Siliconix (USA)
Related Parts
5962-00-248-5241INTERCHANGEABLE
MICROCIRCUIT,LINEAR
LM109H
5961-01-081-3429INTERCHANGEABLE
TRANSISTOR
5961-01-096-8159INTERCHANGEABLE
TRANSISTOR
5961-01-299-8456INTERCHANGEABLE
TRANSISTOR
T235A331-2

Frequently Asked Questions

What is NSN 5961-01-145-7255?

NSN 5961-01-145-7255 is a Transistor, manufactured by Siliconix Incorporated Div Siliconix, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-01-145-7255?

NSN 5961-01-145-7255 has 5 cross-referenced part numbers: RELEASE 6675 (Electronic Industries Association), 019-005543-001 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple), 2N6659 (Electronic Industries Association), 6L.5501.101.00-280592 (Leonardo Germany Gmbh), 2N6659 (Siliconix Incorporated Div Siliconix).

What NSN replaces 5961-01-145-7255?

There are 4 known substitutes for 5961-01-145-7255: 5962-00-248-5241, 5961-01-081-3429, 5961-01-096-8159 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2N6659?

Key specifications for 2N6659: Joint Electronic Device Engineering Council/jedec/case Outline Designation: TO-39; Terminal Type and Quantity: 3 UNINSULATED WIRE LEAD; Mounting Method: TERMINAL; Features Provided: HERMETICALLY SEALED CASE. 14 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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