PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2N3878Transistor

Gilbert Engineering Co Inc/incon Sub of Transitron Electronic Corp · NSN 5961-01-065-0017 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-01-065-0017 — this item is cataloged by the U.S. Government under National Stock Number 5961-01-065-0017. Primary manufacturer part number: 2N3878.
Features
  • Transistor — FSC 5961
  • Voltage Rating in Volts Per Characteristic: 120.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND 75.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN AND 7.0 MAXIMUM EMITTER TO BASE VOLTAGE, STATIC, COLLECTOR OPEN
  • Current Rating Per Characteristic: 5.00 AMPERES MAXIMUM BASE CURRENT, DC AND 7.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC
  • Mounting Method: UNTHREADED HOLE(S)
  • Semiconductor Material: SILICON
  • Internal Configuration: JUNCTION CONTACT
  • Mounting Facility Quantity: 2
  • Specification/standard Data: 81349-MIL-S-19500/526 GOVERNMENT SPECIFICATION
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transistor, cataloged under National Stock Number 5961-01-065-0017, 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 Gilbert Engineering Co Inc/incon Sub of Transitron Electronic Corp. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 19 commercial cross-references from 12 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5961-01-065-0017
Primary Part Number2N3878
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerGilbert Engineering Co Inc/incon Sub of Transitron Electronic Corp
StatusCANCELLED
Voltage Rating in Volts Per Characteristic120.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND 75.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN AND 7.0 MAXIMUM EMITTER TO BASE VOLTAGE, STATIC, COLLECTOR OPEN
Current Rating Per Characteristic5.00 AMPERES MAXIMUM BASE CURRENT, DC AND 7.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC
Mounting MethodUNTHREADED HOLE(S)
Semiconductor MaterialSILICON
Internal ConfigurationJUNCTION CONTACT
Mounting Facility Quantity2
Specification/standard Data81349-MIL-S-19500/526 GOVERNMENT SPECIFICATION
Joint Electronic Device Engineering Council/jedec/case Outline DesignationTO-66
Terminal Type and Quantity2 PIN AND 1 CASE
Power Rating Per Characteristic35.0 WATTS MAXIMUM TOTAL POWER DISSIPATION
Maximum Operating Temp Per Measurement Point200.0 CELSIUS AMBIENT AIR DEGC
Test Data Document81349-MIL-S-19500 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Electrode Internally-Electrically Connected to CaseCOLLECTOR
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5961-00-020-7921VP2023 INTERCHANGEABLE
Transistor
Micro Uspd Inc
5961-00-105-19672N2878 INTERCHANGEABLE
Transistor
Solitron Devices, Inc.
5961-00-225-9617 INTERCHANGEABLE
Transistor
5961-00-254-3202 INTERCHANGEABLE
Transistor
3020-00-273-158040364 INTERCHANGEABLE
Gear,spur
Napco International Llc Dba Napco International Inc
5950-00-446-60879145635 INTERCHANGEABLE
Transformer,pulse
Us Army Aviation and Missile Command
5961-00-469-9901352-0704-021 INTERCHANGEABLE
Transistor
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
3442-00-496-699167600 INTERCHANGEABLE
Frame
Applied Power Inc Power Packer
5961-00-498-53012N3878 INTERCHANGEABLE
Transistor
Renesas Electronics America Inc
5961-00-501-1146352-0704-072 INTERCHANGEABLE
Transistor
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
Cross-Reference Index
Part NumberManufacturer
2N3878 Gilbert Engineering Co Inc/incon Sub of Transitron Electronic Corp (USA)
40364 Renesas Electronics America Inc (USA)
JANTX2N3879 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
2N3879 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
JAN2N3879 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
SM-C-800923-2 Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir (USA)
352-8011-540 Rockwell Collins, Inc. Div Collins Aerospace - Mission Systems (USA)
723084-39 Raytheon Company Div Rmd Strategic (USA)
70240364 Adatum Inc Div Austron (USA)
JANTX2N3879 Joint Army-Navy Specifications Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
5961PL1254597 Jednolity Indeks Materialowy - Uniform Material Index (POL)
MIL-S-19500/526 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-PRF-19500/526 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
723053-1 Raytheon Company Div Rmd Strategic (USA)
SK3026 Renesas Electronics America Inc (USA)
67600 Harris Corp Semiconductor Sector (USA)
7907145-01 Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan (USA)
A3215 Aeronautical Communications Equipment Inc (USA)
67346 Harris Corp Semiconductor Sector (USA)
Related Parts
5961-00-020-7921INTERCHANGEABLE
TRANSISTOR
VP2023
5961-00-105-1967INTERCHANGEABLE
TRANSISTOR
2N2878
5961-00-225-9617INTERCHANGEABLE
TRANSISTOR
5961-00-254-3202INTERCHANGEABLE
TRANSISTOR
3020-00-273-1580INTERCHANGEABLE
GEAR,SPUR
40364
5950-00-446-6087INTERCHANGEABLE
TRANSFORMER,PULSE
9145635
5961-00-469-9901INTERCHANGEABLE
TRANSISTOR
352-0704-021
3442-00-496-6991INTERCHANGEABLE
FRAME
67600
5961-00-498-5301INTERCHANGEABLE
TRANSISTOR
2N3878
5961-00-501-1146INTERCHANGEABLE
TRANSISTOR
352-0704-072
5365-00-676-8692INTERCHANGEABLE
SPACER,SLEEVE
40364
5977-00-678-5507INTERCHANGEABLE
RING AND LINER ASSEMBLY
40364

Frequently Asked Questions

What is NSN 5961-01-065-0017?

NSN 5961-01-065-0017 is a Transistor, manufactured by Gilbert Engineering Co Inc/incon Sub of Transitron Electronic Corp, classified under FSC 5961 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5961-01-065-0017?

NSN 5961-01-065-0017 has 19 cross-referenced part numbers: 2N3878 (Gilbert Engineering Co Inc/incon Sub of Transitron Electronic Corp), 40364 (Renesas Electronics America Inc), JANTX2N3879 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 2N3879 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), JAN2N3879 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 14 more.

What NSN replaces 5961-01-065-0017?

There are 12 known substitutes for 5961-01-065-0017: 5961-00-020-7921, 5961-00-105-1967, 5961-00-225-9617 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2N3878?

Key specifications for 2N3878: Voltage Rating in Volts Per Characteristic: 120.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND 75.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN AND 7.0 MAXIMUM EMITTER TO BASE VOLTAGE, STATIC, COLLECTOR OPEN; Current Rating Per Characteristic: 5.00 AMPERES MAXIMUM BASE CURRENT, DC AND 7.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC; Special Features: JUNCTION PATTERN ARRANGEMENT: NPN; Overall Length: 1.252 INCHES MAXIMUM IN. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5961-01-065-0017 still in active supply?

NSN 5961-01-065-0017 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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