PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

257-20Fuse,enclosed Link

Littelfuse, Inc. · NSN 5920-01-591-0006 · FSC 5920 · No Item Name Available
Verified by PartsTable
NSN 5920-01-591-0006 — this item is cataloged by the U.S. Government under National Stock Number 5920-01-591-0006. Primary manufacturer part number: 257-20.
Features
  • Fuse,enclosed Link — FSC 5920
  • Body Style: RECTANGULAR PLUG-IN
  • 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,enclosed Link, cataloged under National Stock Number 5920-01-591-0006, 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5920-01-591-0006
Primary Part Number257-20
Item NameFuse,enclosed Link
FSC / FSG5920 / 59 — No Item Name Available
ManufacturerLittelfuse, Inc.
StatusACTIVE
Body StyleRECTANGULAR PLUG-IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5962-00-103-7990 INTERCHANGEABLE
Microcircuit,linear
5330-00-237-7965993-3409 INTERCHANGEABLE
Packing,preformed
Hiab Usa Inc
5950-01-154-239125720 INTERCHANGEABLE
Transformer,power
Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit
9540-01-187-6314 INTERCHANGEABLE
Angle,structural
4720-01-246-7982 INTERCHANGEABLE
Hose,nonmetallic
Cross-Reference Index
Part NumberManufacturer
257-20 PRIMARY Littelfuse, Inc. (USA)
Related Parts
5962-00-103-7990INTERCHANGEABLE
MICROCIRCUIT,LINEAR
5330-00-237-7965INTERCHANGEABLE
PACKING,PREFORMED
993-3409
5950-01-154-2391INTERCHANGEABLE
TRANSFORMER,POWER
25720
9540-01-187-6314INTERCHANGEABLE
ANGLE,STRUCTURAL
4720-01-246-7982INTERCHANGEABLE
HOSE,NONMETALLIC

Frequently Asked Questions

What is NSN 5920-01-591-0006?

NSN 5920-01-591-0006 is a Fuse,enclosed Link, manufactured by Littelfuse, Inc., classified under FSC 5920 (No Item Name Available). Status: active.

What are the part numbers for NSN 5920-01-591-0006?

NSN 5920-01-591-0006 has 1 cross-referenced part number: 257-20 (Littelfuse, Inc.).

What NSN replaces 5920-01-591-0006?

There are 5 known substitutes for 5920-01-591-0006: 5962-00-103-7990, 5330-00-237-7965, 5950-01-154-2391 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 257-20?

Key specifications for 257-20: Part Name Assigned by Controlling Agency: ATO BLADE FUSE RATED 32V V; Special Features: 32 VDC; 1000A@32VDC INTERRUPTION RATING; OPERATING TEMP RANGE -40 TO 105 DEG CELCIUS; TYPICAL VOLTAGE DROP: 98MV VDC; End Item Identification: 5895-01-562-6898; SATELLITE COMMUNICATION SYSTEM; Body Style: RECTANGULAR PLUG-IN. 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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