PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

251.250Fuse,cartridge

Littelfuse, Inc. · NSN 5920-01-669-4397 · FSC 5920 · No Item Name Available
Verified by PartsTable
NSN 5920-01-669-4397 — this item is cataloged by the U.S. Government under National Stock Number 5920-01-669-4397. Primary manufacturer part number: 251.250.
Features
  • Fuse,cartridge — FSC 5920
  • Reference Number Differentiating Characteristics: ITEM IS FAA CERTIFIED
  • 1 verified cross-reference
  • Primary manufacturer: Littelfuse, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Fuse,cartridge, cataloged under National Stock Number 5920-01-669-4397, 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 Littelfuse, Inc.. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN5920-01-669-4397
Primary Part Number251.250
Item NameFuse,cartridge
FSC / FSG5920 / 59 — No Item Name Available
ManufacturerLittelfuse, Inc.
StatusACTIVE
Reference Number Differentiating CharacteristicsITEM IS FAA CERTIFIED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
2810-00-639-9731251250 INTERCHANGEABLE
Valve Assembly,oil
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
5920-01-232-6463A 1/4 INTERCHANGEABLE
Fuse,cartridge
Cooper Bussmann, Llc Dba Cooper Industries
5920-01-389-0826251.250 INTERCHANGEABLE
Fuse,cartridge
Littelfuse, Inc.
Cross-Reference Index
Part NumberManufacturer
251.250 Littelfuse, Inc. (USA)
Related Parts
2810-00-639-9731INTERCHANGEABLE
VALVE ASSEMBLY,OIL
251250
5920-01-232-6463INTERCHANGEABLE
FUSE,CARTRIDGE
A 1/4
5920-01-389-0826INTERCHANGEABLE
FUSE,CARTRIDGE
251.250

Frequently Asked Questions

What is NSN 5920-01-669-4397?

NSN 5920-01-669-4397 is a Fuse,cartridge, manufactured by Littelfuse, Inc., classified under FSC 5920 (No Item Name Available). Status: active.

What are the part numbers for NSN 5920-01-669-4397?

NSN 5920-01-669-4397 has 1 cross-referenced part number: 251.250 (Littelfuse, Inc.).

What NSN replaces 5920-01-669-4397?

There are 3 known substitutes for 5920-01-669-4397: 2810-00-639-9731, 5920-01-232-6463, 5920-01-389-0826. Verify interchangeability with system specifications before substitution.

What are the specifications of 251.250?

Key specifications for 251.250: End Item Identification: KC-46 AIRCRAFT; Reference Number Differentiating Characteristics: ITEM IS FAA CERTIFIED. 2 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com