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Alternatives to Littelfuse 856 0000 100

Littelfuse 856 0000 100 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.

856 0000 100 compared against its qualified second sources
856 0000 100Littelfuse85600001009Littelfuse Inc.85500001009Littelfuse Inc.+1more
FFF CompatibilityIdentical thread size and interface for the 850/851/852/853 series fuseholders.Same physical dimensions, slot-knob profile, and materials.Meets the exact same specifications, including IP54 environmental protection rating.Thread size and mechanical mating are identical to the original cap.Identical body dimensions, lacking only the additional silicone sealing ring.Downgrades the environmental sealing rating from IP54 to IP40 due to the absence of the silicone O-ring.
AI Summary

856 0000 100 by Littelfuse: Fuse Holder Accessories CAP FOR 850/851/856.

This is the active orderable bulk-packaged part number for the original 856 0000 100 cap. It serves as an identical, direct-replacement drop-in option that maintains the exact physical specifications and IP54 environmental rating.

  • Exact physical and electrical equivalent of the original 856 0000 100 cap
  • Retains IP54 protection with an integrated silicone sealing ring
  • Directly compatible with existing Littelfuse 850, 851, 852, and 853 series fuseholders

This is the sister cap from the same series designed without the silicone sealing ring. It provides a direct physical replacement if an IP54 moisture-sealing rating is not strictly required by your application.

  • Direct physical fit on existing Littelfuse 850, 851, 852, and 853 series holders
  • Active and widely available variant in the same series
  • Reduces dust and moisture protection from IP54 to IP40.
Lifecycle StatusObsoleteActiveUnknown
Market AvailabilityIn stockIn stockUnknown
REACHREACHREACHUnknown
RoHSRoHSRoHSUnknown
DescriptionFuse Holder Accessories CAP FOR 850/851/856Cap (Cover) Fuseholder; 5x20mmThis is the sister cap from the same series designed without the silicone sealing ring. It provides a direct physical replacement if an IP54
ManufacturerLittelfuseLittelfuse Inc.Littelfuse Inc.
TypeCircuit Protection AccessoriesCircuit Protection AccessoriesComponent
DatasheetOpenOpenN/A
Lead Time15 weeks17 weeksUnknown
Country of Origin---
Export Control Class NumberEAR99EAR99EAR99
HTSUS Code8538.90.8180--
Moisture Sensitivity Level1 (Unlimited)--
Accessory TypeCap (Cover)--
For Use With/Related ProductsFuseholder; 5x20mm--

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Frequently asked questions

Yes. The Littelfuse 856 0000 100 is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.

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