PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

312 1.25Fuse,cartridge

Littelfuse, Inc. · NSN 5920-01-440-0186 · FSC 5920 · No Item Name Available
Verified by PartsTable
NSN 5920-01-440-0186 — this item is cataloged by the U.S. Government under National Stock Number 5920-01-440-0186. Primary manufacturer part number: 312 1.25.
Features
  • Fuse,cartridge — FSC 5920
  • Circuit Over-Current Interruption Type: TIME DELAY
  • Maximum Voltage Rating in Volts: 250.0 AC
  • Circuit Over-Current Interruption Delay Time in Seconds: 5.0 200 PCT OF CURRENT RATING
  • Overall Diameter: 0.250 INCHES NOMINAL IN
  • Continuous Current Rating in Amps: 1.250
  • Surface Treatment: SOLDER TERMINAL
  • Body Style: TUBE TYPE
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Fuse,cartridge, cataloged under National Stock Number 5920-01-440-0186, 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 7 verified specifications, 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5920-01-440-0186
Primary Part Number312 1.25
Item NameFuse,cartridge
FSC / FSG5920 / 59 — No Item Name Available
ManufacturerLittelfuse, Inc.
StatusACTIVE
Circuit Over-Current Interruption TypeTIME DELAY
Maximum Voltage Rating in Volts250.0 AC
Circuit Over-Current Interruption Delay Time in Seconds5.0 200 PCT OF CURRENT RATING
Overall Diameter0.250 INCHES NOMINAL IN
Continuous Current Rating in Amps1.250
Surface TreatmentSOLDER TERMINAL
Body StyleTUBE TYPE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5920-00-284-9493BK/AGC-B-1/8 INTERCHANGEABLE
Fuse,cartridge
Eaton Corporation
5920-00-296-0451 INTERCHANGEABLE
Fuse,cartridge
5920-00-812-3654 INTERCHANGEABLE
Fuse,cartridge
5920-01-421-9154312.125 INTERCHANGEABLE
Fuse,cartridge
Littelfuse, Inc.
Cross-Reference Index
Part NumberManufacturer
312 1.25 PRIMARY Littelfuse, Inc. (USA)
Related Parts
5920-00-284-9493INTERCHANGEABLE
FUSE,CARTRIDGE
BK/AGC-B-1/8
5920-00-296-0451INTERCHANGEABLE
FUSE,CARTRIDGE
5920-00-812-3654INTERCHANGEABLE
FUSE,CARTRIDGE
5920-01-421-9154INTERCHANGEABLE
FUSE,CARTRIDGE
312.125

Frequently Asked Questions

What is NSN 5920-01-440-0186?

NSN 5920-01-440-0186 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 5920-01-440-0186?

NSN 5920-01-440-0186 has 1 cross-referenced part number: 312 1.25 (Littelfuse, Inc.).

What NSN replaces 5920-01-440-0186?

There are 4 known substitutes for 5920-01-440-0186: 5920-00-284-9493, 5920-00-296-0451, 5920-00-812-3654 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 312 1.25?

Key specifications for 312 1.25: Circuit Over-Current Interruption Type: TIME DELAY; Maximum Voltage Rating in Volts: 250.0 AC; Overall Length: 1.250 INCHES NOMINAL IN; Circuit Over-Current Interruption Delay Time in Seconds: 5.0 200 PCT OF CURRENT RATING. 8 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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