PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2N2578Semiconductor Device,thyristor

Freescale Semiconductor, Inc. · NSN 5961-00-945-5389 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-945-5389 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-945-5389. Primary manufacturer part number: 2N2578.
Features
  • Semiconductor Device,thyristor — FSC 5961
  • Semiconductor Material: SILICON
  • Internal Configuration: JUNCTION CONTACT
  • Overall Diameter: 0.875 INCHES MAXIMUM IN
  • Mounting Method: UNTHREADED HOLE(S)
  • Voltage Rating in Volts Per Characteristic: 400.0 MAXIMUM BREAKOVER VOLTAGE, DC
  • Current Rating Per Characteristic: 25.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC
  • Power Rating Per Characteristic: 0.5 WATTS MAXIMUM PEAK GATE POWER DISSIPATION
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Semiconductor Device,thyristor, cataloged under National Stock Number 5961-00-945-5389, 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 Freescale Semiconductor, Inc.. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5961-00-945-5389
Primary Part Number2N2578
Item NameSemiconductor Device,thyristor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerFreescale Semiconductor, Inc.
StatusCANCELLED
Semiconductor MaterialSILICON
Internal ConfigurationJUNCTION CONTACT
Overall Diameter0.875 INCHES MAXIMUM IN
Mounting MethodUNTHREADED HOLE(S)
Voltage Rating in Volts Per Characteristic400.0 MAXIMUM BREAKOVER VOLTAGE, DC
Current Rating Per Characteristic25.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC
Power Rating Per Characteristic0.5 WATTS MAXIMUM PEAK GATE POWER DISSIPATION
Mounting Facility Quantity2
Maximum Operating Temp Per Measurement Point125.0 CELSIUS JUNCTION DEGC
Features ProvidedHERMETICALLY SEALED CASE
Terminal Type and Quantity2 TAB, SOLDER LUG AND 1 CASE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
5961-00-126-1640 INTERCHANGEABLE
Semiconductor Device,thyristor
6930-00-214-7026580-076 INTERCHANGEABLE
Indicator,tachomete
Hickok Waekon Llc
5961-00-901-7403 INTERCHANGEABLE
Semiconductor Device,thyristor
5961-00-903-8023 INTERCHANGEABLE
Semiconductor Device,thyristor
Cross-Reference Index
Part NumberManufacturer
2N2577 Electronic Industries Association
2N2578 PRIMARY Freescale Semiconductor, Inc. (USA)
RELEASE3983 Electronic Industries Association
2N2578 Electronic Industries Association
580-076 Ampex Data Systems Corporation Dba Ampex Intelligent Systems (USA)
2N2577 Freescale Semiconductor, Inc. (USA)
Related Parts
5961-00-126-1640INTERCHANGEABLE
SEMICONDUCTOR DEVICE,THYRISTOR
6930-00-214-7026INTERCHANGEABLE
INDICATOR,TACHOMETE
580-076
5961-00-901-7403INTERCHANGEABLE
SEMICONDUCTOR DEVICE,THYRISTOR
5961-00-903-8023INTERCHANGEABLE
SEMICONDUCTOR DEVICE,THYRISTOR

Frequently Asked Questions

What is NSN 5961-00-945-5389?

NSN 5961-00-945-5389 is a Semiconductor Device,thyristor, manufactured by Freescale Semiconductor, Inc., classified under FSC 5961 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5961-00-945-5389?

NSN 5961-00-945-5389 has 6 cross-referenced part numbers: 2N2577 (Electronic Industries Association), 2N2578 (Freescale Semiconductor, Inc.), RELEASE3983 (Electronic Industries Association), 2N2578 (Electronic Industries Association), 580-076 (Ampex Data Systems Corporation Dba Ampex Intelligent Systems) and 1 more.

What NSN replaces 5961-00-945-5389?

There are 4 known substitutes for 5961-00-945-5389: 5961-00-126-1640, 6930-00-214-7026, 5961-00-901-7403 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2N2578?

Key specifications for 2N2578: Semiconductor Material: SILICON; Internal Configuration: JUNCTION CONTACT; Overall Diameter: 0.875 INCHES MAXIMUM IN; Mounting Method: UNTHREADED HOLE(S). 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5961-00-945-5389 still in active supply?

NSN 5961-00-945-5389 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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