PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1N3909Semiconductor Device,diode

Palomar Products, Inc. · NSN 5961-00-491-4401 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-491-4401 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-491-4401. Primary manufacturer part number: 1N3909.
Features
  • Semiconductor Device,diode — FSC 5961
  • Terminal Type and Quantity: 1 TAB, SOLDER LUG AND 1 THREADED STUD
  • Thread Series Designator: UNF
  • Specification/standard Data: 80131-RELEASE3944 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
  • Features Provided: HERMETICALLY SEALED CASE
  • Overall Diameter: 0.667 INCHES MAXIMUM IN
  • Mounting Method: THREADED STUD(S)
  • Joint Electronic Device Engineering Council/jedec/case Outline Designation: DO-5
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 5961-00-491-4401, 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 Palomar Products, Inc.. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 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
NSN5961-00-491-4401
Primary Part Number1N3909
Item NameSemiconductor Device,diode
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerPalomar Products, Inc.
StatusACTIVE
Terminal Type and Quantity1 TAB, SOLDER LUG AND 1 THREADED STUD
Thread Series DesignatorUNF
Specification/standard Data80131-RELEASE3944 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
Features ProvidedHERMETICALLY SEALED CASE
Overall Diameter0.667 INCHES MAXIMUM IN
Mounting MethodTHREADED STUD(S)
Joint Electronic Device Engineering Council/jedec/case Outline DesignationDO-5
Mounting Facility Quantity1
Nominal Thread Size0.250 INCHES IN
Current Rating Per Characteristic30.00 MILLIAMPERES MAXIMUM AVERAGE FORWARD CURRENT AVERAGED OVER A FULL 60-HZ CYCLE
Overall Width Across Flats0.667 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN
Voltage Rating in Volts Per Characteristic50.0 MAXIMUM REVERSE VOLTAGE, PEAK
Maximum Operating Temp Per Measurement Point150.0 CELSIUS CASE DEGC
MaterialSILICON SEMICONDUCTOR
MaterialGLASS ENCLOSURE
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.
5961-00-903-74771N3911 INTERCHANGEABLE
Semiconductor Device,diode
Westinghouse Electric Corp
5961-01-056-5017UFR3120 INTERCHANGEABLE
Semiconductor Device,diode
Micro Uspd Inc
5961-01-073-3785 INTERCHANGEABLE
Semiconductor Device,diode
Cross-Reference Index
Part NumberManufacturer
1N3909 Adelco Elektronik Gmbh (DEU)
1N3909 Lacon Electronic Gmbh (DEU)
1N3909 PRIMARY Palomar Products, Inc. (USA)
1N3909A Adelco Elektronik Gmbh (DEU)
1N3909 Electronic Industries Association
RELEASE3944 Electronic Industries Association
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
5961-00-903-7477INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
1N3911
5961-01-056-5017INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
UFR3120
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 5961-00-491-4401?

NSN 5961-00-491-4401 is a Semiconductor Device,diode, manufactured by Palomar Products, Inc., classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-00-491-4401?

NSN 5961-00-491-4401 has 6 cross-referenced part numbers: 1N3909 (Adelco Elektronik Gmbh), 1N3909 (Lacon Electronic Gmbh), 1N3909 (Palomar Products, Inc.), 1N3909A (Adelco Elektronik Gmbh), 1N3909 (Electronic Industries Association) and 1 more.

What NSN replaces 5961-00-491-4401?

There are 12 known substitutes for 5961-00-491-4401: 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 1N3909?

Key specifications for 1N3909: Terminal Type and Quantity: 1 TAB, SOLDER LUG AND 1 THREADED STUD; Thread Series Designator: UNF; Specification/standard Data: 80131-RELEASE3944 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION; Overall Length: 0.450 INCHES MAXIMUM IN. 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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