PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21806.3Fuse,cartridge

Littelfuse, Inc. · NSN 5920-01-544-3447 · FSC 5920 · No Item Name Available
Verified by PartsTable
NSN 5920-01-544-3447 — this item is cataloged by the U.S. Government under National Stock Number 5920-01-544-3447. Primary manufacturer part number: 21806.3.
Features
  • Fuse,cartridge — FSC 5920
  • 3 verified cross-references
  • 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 5920-01-544-3447, 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.. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5920-01-544-3447
Primary Part Number21806.3
Item NameFuse,cartridge
FSC / FSG5920 / 59 — No Item Name Available
ManufacturerLittelfuse, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5305-00-620-5492 INTERCHANGEABLE
Screw,machine
3110-01-075-5922500573 INTERCHANGEABLE
Bearing,ball,annular
Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
4820-01-226-3358218-063 INTERCHANGEABLE
Valve,linear,directional Control
Graco Inc.
2530-01-485-1466218063 INTERCHANGEABLE
Lining,friction
Cadillac Gage Textron Inc.
5980-01-680-5943218063 INTERCHANGEABLE
Light Emitting Diode
Eaton Corporation
Cross-Reference Index
Part NumberManufacturer
21806.3 Littelfuse, Inc. (USA)
S506-6.3A Cooper Bussmann, Llc Dba Cooper Industries (USA)
5HT 6.3R Bel Fuse Inc (USA)
Related Parts
5305-00-620-5492INTERCHANGEABLE
SCREW,MACHINE
3110-01-075-5922INTERCHANGEABLE
BEARING,BALL,ANNULAR
500573
4820-01-226-3358INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
218-063
2530-01-485-1466INTERCHANGEABLE
LINING,FRICTION
218063
5980-01-680-5943INTERCHANGEABLE
LIGHT EMITTING DIODE
218063

Frequently Asked Questions

What is NSN 5920-01-544-3447?

NSN 5920-01-544-3447 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 5920-01-544-3447?

NSN 5920-01-544-3447 has 3 cross-referenced part numbers: 21806.3 (Littelfuse, Inc.), S506-6.3A (Cooper Bussmann, Llc Dba Cooper Industries), 5HT 6.3R (Bel Fuse Inc).

What NSN replaces 5920-01-544-3447?

There are 5 known substitutes for 5920-01-544-3447: 5305-00-620-5492, 3110-01-075-5922, 4820-01-226-3358 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21806.3?

Key specifications for 21806.3: End Item Identification: MDR; Special Features: FUSE, 6.3A 250VAC 5X20MM TIME LAG (SLO BLO) VAC. 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