PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

UFR3120Semiconductor Device,diode

Micro Uspd Inc · NSN 5961-01-056-5017 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-01-056-5017 — this item is cataloged by the U.S. Government under National Stock Number 5961-01-056-5017. Primary manufacturer part number: UFR3120.
Features
  • Semiconductor Device,diode — FSC 5961
  • Thread Series Designator: UNF
  • Joint Electronic Device Engineering Council/jedec/case Outline Designation: DO-4
  • Mounting Facility Quantity: 1
  • Features Provided: HERMETICALLY SEALED CASE
  • Function for Which Designed: SWITCHING
  • Voltage Rating in Volts Per Characteristic: 200.0 MAXIMUM REVERSE VOLTAGE, PEAK
  • Terminal Type and Quantity: 1 TAB, SOLDER LUG AND 1 THREADED STUD
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 5961-01-056-5017, 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 Micro Uspd Inc. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 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
NSN5961-01-056-5017
Primary Part NumberUFR3120
Item NameSemiconductor Device,diode
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerMicro Uspd Inc
StatusACTIVE
Thread Series DesignatorUNF
Joint Electronic Device Engineering Council/jedec/case Outline DesignationDO-4
Mounting Facility Quantity1
Features ProvidedHERMETICALLY SEALED CASE
Function for Which DesignedSWITCHING
Voltage Rating in Volts Per Characteristic200.0 MAXIMUM REVERSE VOLTAGE, PEAK
Terminal Type and Quantity1 TAB, SOLDER LUG AND 1 THREADED STUD
Overall Width Across Flats0.437 INCHES MAXIMUM IN
Maximum Operating Temp Per Measurement Point150.0 CELSIUS AMBIENT AIR DEGC
Current Rating Per Characteristic500.00 MILLIAMPERES MAXIMUM FORWARD CURRENT, MAXIMUM PEAK TOTAL VALUE AND 1.00 AMPERES MAXIMUM REVERSE CURRENT, INSTANTANEOUS
Mounting MethodTHREADED STUD(S)
Nominal Thread Size0.190 INCHES IN
MaterialSILICON SEMICONDUCTOR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5961-00-135-8613 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-172-7865 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-194-9074 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-350-1470 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-463-7171 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-472-1103 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-487-81311N3889 INTERCHANGEABLE
Semiconductor Device,diode
Palomar Products, Inc.
5961-00-491-44011N3909 INTERCHANGEABLE
Semiconductor Device,diode
Palomar Products, Inc.
5961-00-903-74771N3911 INTERCHANGEABLE
Semiconductor Device,diode
Westinghouse Electric Corp
5961-01-073-3785 INTERCHANGEABLE
Semiconductor Device,diode
Cross-Reference Index
Part NumberManufacturer
1N3881 Electronic Industries Association
UFR3120 PRIMARY Micro Uspd Inc (USA)
RELEASE3944 Electronic Industries Association
1N3881 Freescale Semiconductor, Inc. (USA)
Related Parts
5961-00-135-8613INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-172-7865INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-194-9074INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-350-1470INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-463-7171INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-472-1103INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-487-8131INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
1N3889
5961-00-491-4401INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
1N3909
5961-00-903-7477INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
1N3911
5961-01-073-3785INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-01-084-4072INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-01-132-0036INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE

Frequently Asked Questions

What is NSN 5961-01-056-5017?

NSN 5961-01-056-5017 is a Semiconductor Device,diode, manufactured by Micro Uspd Inc, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-01-056-5017?

NSN 5961-01-056-5017 has 4 cross-referenced part numbers: 1N3881 (Electronic Industries Association), UFR3120 (Micro Uspd Inc), RELEASE3944 (Electronic Industries Association), 1N3881 (Freescale Semiconductor, Inc.).

What NSN replaces 5961-01-056-5017?

There are 12 known substitutes for 5961-01-056-5017: 5961-00-135-8613, 5961-00-172-7865, 5961-00-194-9074 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of UFR3120?

Key specifications for UFR3120: Thread Series Designator: UNF; Joint Electronic Device Engineering Council/jedec/case Outline Designation: DO-4; Mounting Facility Quantity: 1; Features Provided: HERMETICALLY SEALED CASE. 14 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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