PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A531A256-221Semiconductor Device,diode

Kearfott Corporation Div Guidance and Navigation Division · NSN 5961-01-370-2826 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-01-370-2826 — this item is cataloged by the U.S. Government under National Stock Number 5961-01-370-2826. Primary manufacturer part number: A531A256-221.
Features
  • Semiconductor Device,diode — FSC 5961
  • Terminal Type and Quantity: 2 UNINSULATED WIRE LEAD
  • Material: SILICON SEMICONDUCTOR
  • Nuclear Hardness Critical Feature: HARDENED
  • Test Data Document: 88818-A531A256 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING)
  • Maximum Operating Temp Per Measurement Point: 125.0 CELSIUS JUNCTION DEGC
  • Terminal Length: 0.980 INCHES MINIMUM IN
  • Voltage Rating in Volts Per Characteristic: 40.0 NOMINAL REPETITIVE PEAK REVERSE VOLTAGE
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 5961-01-370-2826, 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 Kearfott Corporation Div Guidance and Navigation Division. Government technical data includes 10 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-01-370-2826
Primary Part NumberA531A256-221
Item NameSemiconductor Device,diode
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerKearfott Corporation Div Guidance and Navigation Division
StatusACTIVE
Terminal Type and Quantity2 UNINSULATED WIRE LEAD
MaterialSILICON SEMICONDUCTOR
Nuclear Hardness Critical FeatureHARDENED
Test Data Document88818-A531A256 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING)
Maximum Operating Temp Per Measurement Point125.0 CELSIUS JUNCTION DEGC
Terminal Length0.980 INCHES MINIMUM IN
Voltage Rating in Volts Per Characteristic40.0 NOMINAL REPETITIVE PEAK REVERSE VOLTAGE
Current Rating Per Characteristic500.00 AMPERES NOMINAL PEAK FORWARD SURGE CURRENT
Mounting MethodTERMINAL
Overall Diameter0.450 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5961-01-017-5456 INTERCHANGEABLE
Semiconductor Device,diode
5961-01-158-2733 INTERCHANGEABLE
Semiconductor Device,diode
Cross-Reference Index
Part NumberManufacturer
1N5825 Freescale Semiconductor, Inc. (USA)
A531A256-221 PRIMARY Kearfott Corporation Div Guidance and Navigation Division (USA)
A531A162-101 Kearfott Corporation Div Guidance and Navigation Division (USA)
NHA531A256-221 Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) (USA)
Related Parts
5961-01-017-5456INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-01-158-2733INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE

Frequently Asked Questions

What is NSN 5961-01-370-2826?

NSN 5961-01-370-2826 is a Semiconductor Device,diode, manufactured by Kearfott Corporation Div Guidance and Navigation Division, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-01-370-2826?

NSN 5961-01-370-2826 has 4 cross-referenced part numbers: 1N5825 (Freescale Semiconductor, Inc.), A531A256-221 (Kearfott Corporation Div Guidance and Navigation Division), A531A162-101 (Kearfott Corporation Div Guidance and Navigation Division), NHA531A256-221 (Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings)).

What NSN replaces 5961-01-370-2826?

There are 2 known substitutes for 5961-01-370-2826: 5961-01-017-5456, 5961-01-158-2733. Verify interchangeability with system specifications before substitution.

What are the specifications of A531A256-221?

Key specifications for A531A256-221: Terminal Type and Quantity: 2 UNINSULATED WIRE LEAD; Material: SILICON SEMICONDUCTOR; Nuclear Hardness Critical Feature: HARDENED; Test Data Document: 88818-A531A256 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING). 11 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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