PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FM03-3AFuse,cartridge

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5920-00-221-8377 · FSC 5920 · No Item Name Available
Verified by PartsTable
NSN 5920-00-221-8377 — this item is cataloged by the U.S. Government under National Stock Number 5920-00-221-8377. Primary manufacturer part number: FM03-3A.
Features
  • Fuse,cartridge — FSC 5920
  • Circuit Over-Current Interruption Type: NORMAL INSTANTANEOUS
  • Surface Treatment: NICKEL TERMINAL
  • Specification/standard Data: 81349-MIL-F-23419/3 GOVERNMENT SPECIFICATION
  • Test Data Document: 81349-MIL-F-23419 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
  • Maximum Voltage Rating in Volts: 250.0 AC AND 250.0 DC
  • Features Provided: NONRENEWABLE FUSIBLE ELEMENT
  • Material: CERAMIC OR PLASTIC CASE
Applications
  • Applications requiring Ceramic or Plastic Case construction
General Description

The Fuse,cartridge, cataloged under National Stock Number 5920-00-221-8377, is classified within Federal Supply Class 5920 (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 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 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
NSN5920-00-221-8377
Primary Part NumberFM03-3A
Item NameFuse,cartridge
FSC / FSG5920 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Circuit Over-Current Interruption TypeNORMAL INSTANTANEOUS
Surface TreatmentNICKEL TERMINAL
Specification/standard Data81349-MIL-F-23419/3 GOVERNMENT SPECIFICATION
Test Data Document81349-MIL-F-23419 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Maximum Voltage Rating in Volts250.0 AC AND 250.0 DC
Features ProvidedNONRENEWABLE FUSIBLE ELEMENT
MaterialCERAMIC OR PLASTIC CASE
Overall Diameter0.246 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN
MaterialCOPPER OR COPPER ALLOY TERMINAL
Interruption Indicator MethodOPAQUE BODY
Continuous Current Rating in Amps3.000
Body StyleTUBE TYPE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5920-00-148-2857 INTERCHANGEABLE
Fuse,cartridge
5920-00-161-4551 INTERCHANGEABLE
Fuse,cartridge
5920-00-163-4093 INTERCHANGEABLE
Fuse,cartridge
5920-00-180-4262 INTERCHANGEABLE
Fuse,cartridge
5920-00-185-5801 INTERCHANGEABLE
Fuse,cartridge
5920-00-190-3348 INTERCHANGEABLE
Fuse,cartridge
5920-00-236-8188 INTERCHANGEABLE
Fuse,cartridge
5920-00-246-2186 INTERCHANGEABLE
Fuse,cartridge
5920-00-246-2187 INTERCHANGEABLE
Fuse,cartridge
5920-00-251-1472 INTERCHANGEABLE
Fuse,cartridge
Cross-Reference Index
Part NumberManufacturer
FM03-3A Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MILF23419-3 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
264-0962-120 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA)
FM03-250V3A Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
BHH9110 Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) (USA)
FM03250V3A Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5920-00-148-2857INTERCHANGEABLE
FUSE,CARTRIDGE
5920-00-161-4551INTERCHANGEABLE
FUSE,CARTRIDGE
5920-00-163-4093INTERCHANGEABLE
FUSE,CARTRIDGE
5920-00-180-4262INTERCHANGEABLE
FUSE,CARTRIDGE
5920-00-185-5801INTERCHANGEABLE
FUSE,CARTRIDGE
5920-00-190-3348INTERCHANGEABLE
FUSE,CARTRIDGE
5920-00-236-8188INTERCHANGEABLE
FUSE,CARTRIDGE
5920-00-246-2186INTERCHANGEABLE
FUSE,CARTRIDGE
5920-00-246-2187INTERCHANGEABLE
FUSE,CARTRIDGE
5920-00-251-1472INTERCHANGEABLE
FUSE,CARTRIDGE
5920-00-403-4899INTERCHANGEABLE
FUSE,CARTRIDGE
5920-00-407-7087INTERCHANGEABLE
FUSE,CARTRIDGE

Frequently Asked Questions

What is NSN 5920-00-221-8377?

NSN 5920-00-221-8377 is a Fuse,cartridge, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5920 (No Item Name Available). Status: active.

What are the part numbers for NSN 5920-00-221-8377?

NSN 5920-00-221-8377 has 6 cross-referenced part numbers: FM03-3A (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MILF23419-3 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 264-0962-120 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems), FM03-250V3A (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), BHH9110 (Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings)) and 1 more.

What NSN replaces 5920-00-221-8377?

There are 12 known substitutes for 5920-00-221-8377: 5920-00-148-2857, 5920-00-161-4551, 5920-00-163-4093 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FM03-3A?

Key specifications for FM03-3A: Circuit Over-Current Interruption Type: NORMAL INSTANTANEOUS; Surface Treatment: NICKEL TERMINAL; Specification/standard Data: 81349-MIL-F-23419/3 GOVERNMENT SPECIFICATION; Test Data Document: 81349-MIL-F-23419 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).. 13 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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