PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1N126ASemiconductor Device,diode

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5961-00-577-1221 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-577-1221 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-577-1221. Primary manufacturer part number: 1N126A.
Features
  • Semiconductor Device,diode — FSC 5961
  • Nondefinitive Spec/std Data: 1N126A TYPE
  • Features Provided: HERMETICALLY SEALED CASE
  • Terminal Type and Quantity: 2 UNINSULATED WIRE LEAD
  • Material: GERMANIUM SEMICONDUCTOR
  • 3 verified cross-references
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • Circuit regulation and filtering
  • Signal conditioning
  • Power supply stabilization
  • Applications requiring Germanium Semiconductor construction
General Description

The Semiconductor Device,diode, cataloged under National Stock Number 5961-00-577-1221, 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 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-00-577-1221
Primary Part Number1N126A
Item NameSemiconductor Device,diode
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Nondefinitive Spec/std Data1N126A TYPE
Features ProvidedHERMETICALLY SEALED CASE
Terminal Type and Quantity2 UNINSULATED WIRE LEAD
MaterialGERMANIUM SEMICONDUCTOR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5961-00-578-1772 INTERCHANGEABLE
Semiconductor Device,diode
5961-00-669-6884 INTERCHANGEABLE
Semiconductor Device,diode
5960-00-783-5696 INTERCHANGEABLE
Electron Tube
Cross-Reference Index
Part NumberManufacturer
1N126A Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MILE1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
8109514 Us Army Aviation and Missile Command (USA)
Related Parts
5961-00-578-1772INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5961-00-669-6884INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5960-00-783-5696INTERCHANGEABLE
ELECTRON TUBE

Frequently Asked Questions

What is NSN 5961-00-577-1221?

NSN 5961-00-577-1221 is a Semiconductor Device,diode, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-00-577-1221?

NSN 5961-00-577-1221 has 3 cross-referenced part numbers: 1N126A (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MILE1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 8109514 (Us Army Aviation and Missile Command).

What NSN replaces 5961-00-577-1221?

There are 3 known substitutes for 5961-00-577-1221: 5961-00-578-1772, 5961-00-669-6884, 5960-00-783-5696. Verify interchangeability with system specifications before substitution.

What are the specifications of 1N126A?

Key specifications for 1N126A: Nondefinitive Spec/std Data: 1N126A TYPE; Features Provided: HERMETICALLY SEALED CASE; Terminal Type and Quantity: 2 UNINSULATED WIRE LEAD; Material: GERMANIUM SEMICONDUCTOR. 4 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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