PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SJE2521KTransistor

Freescale Semiconductor, Inc. · NSN 5961-01-331-4105 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-01-331-4105 — this item is cataloged by the U.S. Government under National Stock Number 5961-01-331-4105. Primary manufacturer part number: SJE2521K.
Features
  • Transistor — FSC 5961
  • Joint Electronic Device Engineering Council/jedec/case Outline Designation: TO-220
  • Voltage Rating in Volts Per Characteristic: 80.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 80.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN AND 5.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN
  • Terminal Length: 2.04 MILLIMETERS MINIMUM AND 2.92 MILLIMETERS MAXIMUM MM
  • Mounting Method: TERMINAL AND UNTHREADED HOLE(S)
  • Transfer Ratio: 60.0 MINIMUM STATIC FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER
  • Mounting Facility Quantity: 1
  • Semiconductor Material: SILICON
Applications
  • Applications requiring Plastic Enclosure construction
General Description

The Transistor, cataloged under National Stock Number 5961-01-331-4105, 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 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-01-331-4105
Primary Part NumberSJE2521K
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerFreescale Semiconductor, Inc.
StatusACTIVE
Joint Electronic Device Engineering Council/jedec/case Outline DesignationTO-220
Voltage Rating in Volts Per Characteristic80.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 80.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN AND 5.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN
Terminal Length2.04 MILLIMETERS MINIMUM AND 2.92 MILLIMETERS MAXIMUM MM
Mounting MethodTERMINAL AND UNTHREADED HOLE(S)
Transfer Ratio60.0 MINIMUM STATIC FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER
Mounting Facility Quantity1
Semiconductor MaterialSILICON
Power Rating Per Characteristic50.0 WATTS MAXIMUM TOTAL DEVICE DISSIPATION
Internal ConfigurationJUNCTION CONTACT
Current Rating Per Characteristic10.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC
Terminal Type and Quantity3 PIN
MaterialPLASTIC ENCLOSURE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5975-00-079-41691533 INTERCHANGEABLE
Entrance Cap,electrical
Abb Installation Products Inc
3110-00-155-6659105M INTERCHANGEABLE
Bearing,ball,annular
Skf Usa Inc.
7920-00-165-727754007 INTERCHANGEABLE
Brush,dusting,bench
Jason Incorporated Dba Osborn International a Unit of Jason
2920-00-229-6558378 INTERCHANGEABLE
Spark Plug
Honeywell International Inc Dba Honeywell Div Consumer Products Group
3030-00-288-6460378 INTERCHANGEABLE
Belt,v
Contitech Usa, Inc Dba Veyance Technologies
3439-00-360-5022X-ACTO 7378 INTERCHANGEABLE
Soldering Iron,electric
Elmers Products Inc Dba Elmers Adhesives and Office Products
3695-00-509-1707 INTERCHANGEABLE
Container,chain,oil
2940-00-567-4978AF2034 INTERCHANGEABLE
Filter Element,intake Air Cleane
Arvinmeritor Inc
5970-00-583-9019378 INTERCHANGEABLE
Insulator,standoff
Isolantite Manufacturing Co Inc Div Isolantite Manufacturing Inc.
6240-00-941-2698CM8-396 INTERCHANGEABLE
Lamp,incandescent
Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
Cross-Reference Index
Part NumberManufacturer
SJE2521K Freescale Semiconductor, Inc. (USA)
378 Nte Electronics, Inc (USA)
ECG378 Philips Ecg Inc Div of North American Philips Corp (USA)
Related Parts
5975-00-079-4169INTERCHANGEABLE
ENTRANCE CAP,ELECTRICAL
1533
3110-00-155-6659INTERCHANGEABLE
BEARING,BALL,ANNULAR
105M
7920-00-165-7277INTERCHANGEABLE
BRUSH,DUSTING,BENCH
54007
2920-00-229-6558INTERCHANGEABLE
SPARK PLUG
378
3030-00-288-6460INTERCHANGEABLE
BELT,V
378
3439-00-360-5022INTERCHANGEABLE
SOLDERING IRON,ELECTRIC
X-ACTO 7378
3695-00-509-1707INTERCHANGEABLE
CONTAINER,CHAIN,OIL
2940-00-567-4978INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
AF2034
5970-00-583-9019INTERCHANGEABLE
INSULATOR,STANDOFF
378
6240-00-941-2698INTERCHANGEABLE
LAMP,INCANDESCENT
CM8-396
5930-01-046-9443INTERCHANGEABLE
SWITCH,CODE INDICATING WHEEL
3078
5140-01-334-5956INTERCHANGEABLE
CABINET,TOOL,MOBILE
378

Frequently Asked Questions

What is NSN 5961-01-331-4105?

NSN 5961-01-331-4105 is a Transistor, manufactured by Freescale Semiconductor, Inc., classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-01-331-4105?

NSN 5961-01-331-4105 has 3 cross-referenced part numbers: SJE2521K (Freescale Semiconductor, Inc.), 378 (Nte Electronics, Inc), ECG378 (Philips Ecg Inc Div of North American Philips Corp).

What NSN replaces 5961-01-331-4105?

There are 12 known substitutes for 5961-01-331-4105: 5975-00-079-4169, 3110-00-155-6659, 7920-00-165-7277 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SJE2521K?

Key specifications for SJE2521K: Special Features: JUNCTION PATTERN ARRANGEMENT: PNP; Overall Length: 14.23 MILLIMETERS MINIMUM AND 15.87 MILLIMETERS MAXIMUM MM; Overall Height: 3.56 MILLIMETERS MINIMUM AND 4.82 MILLIMETERS MAXIMUM MM; Joint Electronic Device Engineering Council/jedec/case Outline Designation: TO-220. 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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