PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1N5221BSemiconductor Device,diode

Telcom Semiconductor Inc · NSN 5961-00-425-6311 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-425-6311 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-425-6311. Primary manufacturer part number: 1N5221B.
Features
  • Semiconductor Device,diode — FSC 5961
  • Material: SILICON SEMICONDUCTOR
  • Joint Electronic Device Engineering Council/jedec/case Outline Designation: DO-204AH
  • Features Provided: HERMETICALLY SEALED CASE
  • Voltage Rating in Volts Per Characteristic: 2.4 NOMINAL NOMINAL REGULATOR VOLTAGE
  • Power Rating Per Characteristic: 500.0 MILLIWATTS MAXIMUM TOTAL DEVICE DISSIPATION
  • Function for Which Designed: ZENER DIODE
  • Mounting Method: TERMINAL
Applications
  • Circuit regulation and filtering
  • Signal conditioning
  • Power supply stabilization
  • Applications requiring Silicon Semiconductor construction
General Description

The Semiconductor Device,diode, cataloged under National Stock Number 5961-00-425-6311, 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 Telcom Semiconductor Inc. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 21 commercial cross-references from 18 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5961-00-425-6311
Primary Part Number1N5221B
Item NameSemiconductor Device,diode
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerTelcom Semiconductor Inc
StatusCANCELLED
MaterialSILICON SEMICONDUCTOR
Joint Electronic Device Engineering Council/jedec/case Outline DesignationDO-204AH
Features ProvidedHERMETICALLY SEALED CASE
Voltage Rating in Volts Per Characteristic2.4 NOMINAL NOMINAL REGULATOR VOLTAGE
Power Rating Per Characteristic500.0 MILLIWATTS MAXIMUM TOTAL DEVICE DISSIPATION
Function for Which DesignedZENER DIODE
Mounting MethodTERMINAL
MaterialGLASS ENCLOSURE
Overall Diameter0.075 INCHES NOMINAL IN
Specification/standard Data80131-RELEASE5566 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
Maximum Operating Temp Per Measurement Point200.0 CELSIUS AMBIENT AIR DEGC
Terminal Length1.250 INCHES NOMINAL IN
Terminal Type and Quantity2 UNINSULATED WIRE LEAD
Current Rating Per Characteristic20.00 MILLIAMPERES NOMINAL VOLTAGE REGULATOR DIODE CURRENT
Voltage Tolerance in Percent-5.0 TO 5.0
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
5935-00-239-4976535744-1 INTERCHANGEABLE
Adapter,connector
Raytheon Company Dba Raytheon Co
5330-00-802-3367101185 INTERCHANGEABLE
Packing,preformed
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
5961-01-004-1062 INTERCHANGEABLE
Semiconductor Device,diode
5950-01-021-1131989109-13C INTERCHANGEABLE
Coil,radio Frequency
Raytheon Company Dba Raytheon
4820-01-569-1416101185 INTERCHANGEABLE
Valve,ball
Hydraulics International, Inc. Dba Hydraulics International Inc
Cross-Reference Index
Part NumberManufacturer
1N5221B Telcom Semiconductor Inc (USA)
1N5221B General Semiconductor Industries Inc (USA)
101-185 Data General Corporation (USA)
1N5221 Illinois Tool Works, Inc. Div Magnaflux (USA)
1N5221B Burns and Towne Inc (USA)
1N5221B International Diode Corp (USA)
588101-1 Raytheon Company Div Corp (USA)
1N5221B Infineon Technologies Americas Corp (USA)
RELEASE5566 Electronic Industries Association
1N5221B On Semiconductor Corporation (USA)
CR112-1 Raytheon Technical Services Company (USA)
1N5221B Electronic Industries Association
1N5221B Semitronics Corp (USA)
1N5221A Fairchild Semiconductor Corp (USA)
1N5221B Air Force-Navy Aeronautical Specifications Promulgated by Aeronautical Standards Group
1N5221 Electronic Industries Association
1N5221B Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
1N5221B C O D I Corp Dba Codi Semiconductor Inc (USA)
1N5221A Freescale Semiconductor, Inc. (USA)
1N5221B Microsemi Corp.-Scottsdale Dba Microsemi (USA)
Related Parts
5935-00-239-4976INTERCHANGEABLE
ADAPTER,CONNECTOR
535744-1
5330-00-802-3367INTERCHANGEABLE
PACKING,PREFORMED
101185
5961-01-004-1062INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5950-01-021-1131INTERCHANGEABLE
COIL,RADIO FREQUENCY
989109-13C
4820-01-569-1416INTERCHANGEABLE
VALVE,BALL
101185

Frequently Asked Questions

What is NSN 5961-00-425-6311?

NSN 5961-00-425-6311 is a Semiconductor Device,diode, manufactured by Telcom Semiconductor Inc, classified under FSC 5961 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5961-00-425-6311?

NSN 5961-00-425-6311 has 21 cross-referenced part numbers: 1N5221B (Telcom Semiconductor Inc), 1N5221B (General Semiconductor Industries Inc), 101-185 (Data General Corporation), 1N5221 (Illinois Tool Works, Inc. Div Magnaflux), 1N5221B (Burns and Towne Inc) and 16 more.

What NSN replaces 5961-00-425-6311?

There are 5 known substitutes for 5961-00-425-6311: 5935-00-239-4976, 5330-00-802-3367, 5961-01-004-1062 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1N5221B?

Key specifications for 1N5221B: Material: SILICON SEMICONDUCTOR; Joint Electronic Device Engineering Council/jedec/case Outline Designation: DO-204AH; Features Provided: HERMETICALLY SEALED CASE; Voltage Rating in Volts Per Characteristic: 2.4 NOMINAL NOMINAL REGULATOR VOLTAGE. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5961-00-425-6311 still in active supply?

NSN 5961-00-425-6311 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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