PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2N1778Semiconductor Device,thyristor

Advanced Semiconductor,inc. Dba Advanced Semiconductor Inc · NSN 5961-00-946-2015 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-946-2015 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-946-2015. Primary manufacturer part number: 2N1778.
Features
  • Semiconductor Device,thyristor — FSC 5961
  • Power Rating Per Characteristic: 0.5 WATTS MAXIMUM PEAK GATE POWER DISSIPATION
  • Semiconductor Material: SILICON
  • Overall Width Across Flats: 0.437 INCHES MAXIMUM IN
  • Voltage Rating in Volts Per Characteristic: 500.0 MAXIMUM BREAKOVER VOLTAGE, DC
  • Nominal Thread Size: 0.190 INCHES IN
  • Thread Series Designator: UNF
  • Maximum Operating Temp Per Measurement Point: 125.0 CELSIUS JUNCTION DEGC
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Semiconductor Device,thyristor, cataloged under National Stock Number 5961-00-946-2015, 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 Advanced Semiconductor,inc. Dba Advanced Semiconductor Inc. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-00-946-2015
Primary Part Number2N1778
Item NameSemiconductor Device,thyristor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerAdvanced Semiconductor,inc. Dba Advanced Semiconductor Inc
StatusACTIVE
Power Rating Per Characteristic0.5 WATTS MAXIMUM PEAK GATE POWER DISSIPATION
Semiconductor MaterialSILICON
Overall Width Across Flats0.437 INCHES MAXIMUM IN
Voltage Rating in Volts Per Characteristic500.0 MAXIMUM BREAKOVER VOLTAGE, DC
Nominal Thread Size0.190 INCHES IN
Thread Series DesignatorUNF
Maximum Operating Temp Per Measurement Point125.0 CELSIUS JUNCTION DEGC
Mounting Facility Quantity1
Electrode Internally-Electrically Connected to CaseGATE
Current Rating Per Characteristic4.70 AMPERES MAXIMUM COLLECTOR CURRENT, DC
Mounting MethodTHREADED STUD(S)
Internal ConfigurationJUNCTION CONTACT
Features ProvidedHERMETICALLY SEALED CASE
Terminal Type and Quantity1 THREADED STUD AND 2 TAB, SOLDER LUG
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5961-00-005-2922 INTERCHANGEABLE
Semiconductor Device,thyristor
5961-00-469-9968353-6547-011 INTERCHANGEABLE
Semiconductor Device,thyristor
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5961-00-719-9398 INTERCHANGEABLE
Semiconductor Device,thyristor
5961-00-764-3217 INTERCHANGEABLE
Transistor
5961-00-904-6386 INTERCHANGEABLE
Semiconductor Device,thyristor
5961-00-951-5490 INTERCHANGEABLE
Semiconductor Device,thyristor
Cross-Reference Index
Part NumberManufacturer
2N1778 Central Semiconductor, Llc Dba Central Semiconductor Corp (USA)
RELEASE3903 Electronic Industries Association
2N1778 Pd&e Electronics, Llc (USA)
2N1778 PRIMARY Advanced Semiconductor,inc. Dba Advanced Semiconductor Inc (USA)
2N1778 General Electric Co Semi-Conductor Products Dept Power Components Opn (USA)
2N1778 Electronic Industries Association
Related Parts
5961-00-005-2922INTERCHANGEABLE
SEMICONDUCTOR DEVICE,THYRISTOR
5961-00-469-9968INTERCHANGEABLE
SEMICONDUCTOR DEVICE,THYRISTOR
353-6547-011
5961-00-719-9398INTERCHANGEABLE
SEMICONDUCTOR DEVICE,THYRISTOR
5961-00-764-3217INTERCHANGEABLE
TRANSISTOR
5961-00-904-6386INTERCHANGEABLE
SEMICONDUCTOR DEVICE,THYRISTOR
5961-00-951-5490INTERCHANGEABLE
SEMICONDUCTOR DEVICE,THYRISTOR

Frequently Asked Questions

What is NSN 5961-00-946-2015?

NSN 5961-00-946-2015 is a Semiconductor Device,thyristor, manufactured by Advanced Semiconductor,inc. Dba Advanced Semiconductor Inc, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-00-946-2015?

NSN 5961-00-946-2015 has 6 cross-referenced part numbers: 2N1778 (Central Semiconductor, Llc Dba Central Semiconductor Corp), RELEASE3903 (Electronic Industries Association), 2N1778 (Pd&e Electronics, Llc), 2N1778 (Advanced Semiconductor,inc. Dba Advanced Semiconductor Inc), 2N1778 (General Electric Co Semi-Conductor Products Dept Power Components Opn) and 1 more.

What NSN replaces 5961-00-946-2015?

There are 6 known substitutes for 5961-00-946-2015: 5961-00-005-2922, 5961-00-469-9968, 5961-00-719-9398 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2N1778?

Key specifications for 2N1778: Power Rating Per Characteristic: 0.5 WATTS MAXIMUM PEAK GATE POWER DISSIPATION; Semiconductor Material: SILICON; Overall Width Across Flats: 0.437 INCHES MAXIMUM IN; Voltage Rating in Volts Per Characteristic: 500.0 MAXIMUM BREAKOVER VOLTAGE, DC. 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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