PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1A20777H01Transistor

Northrop Grumman Support Services Corp · NSN 5961-01-329-1328 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-01-329-1328 — this item is cataloged by the U.S. Government under National Stock Number 5961-01-329-1328. Primary manufacturer part number: 1A20777H01.
Features
  • Transistor — FSC 5961
  • Electrode Internally-Electrically Connected to Case: COLLECTOR
  • Maximum Operating Temp Per Measurement Point: 200.0 CELSIUS JUNCTION DEGC
  • Test Data Document: 97942-1A20777 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING)
  • Internal Configuration: JUNCTION CONTACT
  • Mounting Facility Quantity: 2
  • Voltage Rating in Volts Per Characteristic: 80.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE, DC WITH SPECIFIED CIRCUIT BETWEEN BASE AND EMITTER AND 7.0 MAXIMUM EMITTER TO BASE VOLTAGE, DC
  • Power Rating Per Characteristic: 25.0 WATTS MAXIMUM TOTAL DEVICE DISSIPATION
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transistor, cataloged under National Stock Number 5961-01-329-1328, 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 Northrop Grumman Support Services Corp. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-01-329-1328
Primary Part Number1A20777H01
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerNorthrop Grumman Support Services Corp
StatusACTIVE
Electrode Internally-Electrically Connected to CaseCOLLECTOR
Maximum Operating Temp Per Measurement Point200.0 CELSIUS JUNCTION DEGC
Test Data Document97942-1A20777 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING)
Internal ConfigurationJUNCTION CONTACT
Mounting Facility Quantity2
Voltage Rating in Volts Per Characteristic80.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE, DC WITH SPECIFIED CIRCUIT BETWEEN BASE AND EMITTER AND 7.0 MAXIMUM EMITTER TO BASE VOLTAGE, DC
Power Rating Per Characteristic25.0 WATTS MAXIMUM TOTAL DEVICE DISSIPATION
Joint Electronic Device Engineering Council/jedec/case Outline DesignationTO-66
Current Rating Per Characteristic4.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC AND 2.00 AMPERES MAXIMUM BASE CURRENT, DC
Semiconductor MaterialSILICON
Mounting MethodUNTHREADED HOLE(S)
Terminal Type and Quantity2 PIN AND 1 CASE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5961-00-199-5030 INTERCHANGEABLE
Transistor
5961-00-369-9429ST2T029LS0684 INTERCHANGEABLE
Transistor
Northrop Grumman Corp Electronic Systems Defensive System Div
5961-00-419-7558200791-701 INTERCHANGEABLE
Transistor
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
5961-00-470-8291 INTERCHANGEABLE
Transistor
5961-00-993-3115 INTERCHANGEABLE
Transistor
5961-00-996-1806 INTERCHANGEABLE
Transistor
5961-01-037-4990244450-000 INTERCHANGEABLE
Transistor
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
Cross-Reference Index
Part NumberManufacturer
1A20777H01 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
1A20777H01 PRIMARY Northrop Grumman Support Services Corp (USA)
2N3741 Solitron Devices, Inc. (USA)
2N3741 Freescale Semiconductor, Inc. (USA)
Related Parts
5961-00-199-5030INTERCHANGEABLE
TRANSISTOR
5961-00-369-9429INTERCHANGEABLE
TRANSISTOR
ST2T029LS0684
5961-00-419-7558INTERCHANGEABLE
TRANSISTOR
200791-701
5961-00-470-8291INTERCHANGEABLE
TRANSISTOR
5961-00-993-3115INTERCHANGEABLE
TRANSISTOR
5961-00-996-1806INTERCHANGEABLE
TRANSISTOR
5961-01-037-4990INTERCHANGEABLE
TRANSISTOR
244450-000

Frequently Asked Questions

What is NSN 5961-01-329-1328?

NSN 5961-01-329-1328 is a Transistor, manufactured by Northrop Grumman Support Services Corp, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-01-329-1328?

NSN 5961-01-329-1328 has 4 cross-referenced part numbers: 1A20777H01 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp), 1A20777H01 (Northrop Grumman Support Services Corp), 2N3741 (Solitron Devices, Inc.), 2N3741 (Freescale Semiconductor, Inc.).

What NSN replaces 5961-01-329-1328?

There are 7 known substitutes for 5961-01-329-1328: 5961-00-199-5030, 5961-00-369-9429, 5961-00-419-7558 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1A20777H01?

Key specifications for 1A20777H01: Electrode Internally-Electrically Connected to Case: COLLECTOR; Maximum Operating Temp Per Measurement Point: 200.0 CELSIUS JUNCTION DEGC; Overall Height: 0.340 INCHES MAXIMUM IN; Test Data Document: 97942-1A20777 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING). 16 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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