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.
Equivalent and substitute parts for Littelfuse 856 0000 100
 856 0000 100Littelfuse | 85600001009Littelfuse Inc. | 85500001009Littelfuse Inc. | +1more | |
|---|---|---|---|---|
| FFF Compatibility | Identical 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.
| 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.
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| Lifecycle Status | Obsolete | Active | Unknown | |
| Market Availability | In stock | In stock | Unknown | |
| REACH | REACH | REACH | Unknown | |
| RoHS | RoHS | RoHS | Unknown | |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 853 0000 100Littelfuse | Non-stock | Obsolete | 3Alternatives availableSee Alternatives |
 02160025-000TE Connectivity Measurement Specialties | Discontinued | Obsolete | 3Alternatives availableSee Alternatives |
 Y00532K00000J0LVPG Foil Resistors | In stock | Active | 4Alternatives availableSee Alternatives |
 M3421-000006-100PGTE Connectivity Measurement Specialties | In stock | Active | 4Alternatives availableSee Alternatives |
 3SU1500-0AA10-0AA0Siemens | In stock | Active | 3Alternatives availableSee Alternatives |
| Y00532K0000J0LVishay Precision Group Foil Resistors | Discontinued | Obsolete | 3Alternatives availableSee Alternatives |
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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.
The closest qualified second sources for the Littelfuse 856 0000 100 are the 85600001009 (Littelfuse Inc.) and the 85500001009 (Littelfuse Inc.), out of 3 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Not always. The alternatives to the 856 0000 100 are matched on function but can differ in package, pinout or a key parameter, so review the fit/form/function notes in the table and the datasheet before designing one in.
The 856 0000 100 (Littelfuse) is a part in the Circuit Protection Accessories category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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