Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

main

Andrew Kazour Publish provisional exact-part KiCad library and source provenance f0d1dcb 9d ago

0451004.MRL | Fuse

Littelfuse 0451004.MRL is a fuse. Nominal selection: 4A / 125V.

Library status

This is a provisional reusable library record. The supplied symbol and footprint preserve the project's KiCad pin numbering. Pin-to-pad number sets match. The footprint dimensions, solder process and exact-part mechanical fit have not received a manufacturer-drawing sign-off.

3D representation: Illustrative generated package; not manufacturer mechanical CAD. Generic package geometry must not be treated as certified dimensions for this exact MPN. The annotated model adds nonphysical footprint references; use the clean model for assemblies.

Identity and resources

Field	Value
Manufacturer	Littelfuse
Exact MPN	`0451004.MRL`
Function	Fuse
Nominal selection	4A / 125V
KiCad package	`Fuse_451`
Electrical pin numbers	2

Manufacturer datasheet or resource. Saved PDF.

Ordering

Distributor identities checked on 2026-10-11. Stock and pricing change; open the vendor link for current availability.

mouser: 576-0451004.MRL
digikey: F2586TR-ND
lcsc: C27515

Pins

Pin / pad	Signal	Electrical type
1	1	passive
2	2	passive

Pin names and electrical types above come from the KiCad symbol. Check the linked manufacturer datasheet for electrical limits, handling, package dimensions and pin functions before using the library in a new design.

CAD downloads

The footprint uses ${KIPRJMOD}/models/Fuse_451_visual.wrl. Place the supplied models folder beside your KiCad project, or update the binding to your shared library location. No global library settings are changed by these files.

Provenance

Symbols and stock footprints originate from the KiCad 10 libraries. The fuse footprint was authored for this prototype. Package models retain the source bytes and attribution. The two illustrative models are explicitly identified as generated representations. Conversion and source hashes are recorded in provenance. Datasheets and third-party assets retain their original terms.

Original page documentation and project-authored library additions: CC BY 4.0. KiCad library assets: CC BY-SA 4.0 with KiCad library exception. See LICENSE.

# 0451004.MRL | Fuse

Littelfuse **0451004.MRL** is a fuse. Nominal selection: 4A / 125V.

## Library status

This is a **provisional reusable library record**. The supplied symbol and footprint preserve the project's KiCad pin numbering. Pin-to-pad number sets match. The footprint dimensions, solder process and exact-part mechanical fit have not received a manufacturer-drawing sign-off.

3D representation: **Illustrative generated package; not manufacturer mechanical CAD**. Generic package geometry must not be treated as certified dimensions for this exact MPN. The annotated model adds nonphysical footprint references; use the clean model for assemblies.

## Identity and resources

| Field | Value |
|---|---|
| Manufacturer | Littelfuse |
| Exact MPN | `0451004.MRL` |
| Function | Fuse |
| Nominal selection | 4A / 125V |
| KiCad package | `Fuse_451` |
| Electrical pin numbers | 2 |

[Manufacturer datasheet or resource](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588894527024848896). [Saved PDF](docs/datasheet.pdf).

## Ordering

Distributor identities checked on 2026-10-11. Stock and pricing change; open the vendor link for current availability.

- mouser: [576-0451004.MRL](https://www.mouser.com/en/ProductDetail/Littelfuse/0451004.MRL?qs=TSScP84zSEr%252BgMXSppunwQ%3D%3D)
- digikey: [F2586TR-ND](https://www.digikey.com/en/products/detail/littelfuse-inc/0451004-MRL/700827)
- lcsc: [C27515](None)

## Pins

| Pin / pad | Signal | Electrical type |
|---|---|---|
| 1 | 1 | passive |
| 2 | 2 | passive |

Pin names and electrical types above come from the KiCad symbol. Check the linked manufacturer datasheet for electrical limits, handling, package dimensions and pin functions before using the library in a new design.

## CAD downloads

- [symbol](0451004-mrl.kicad_sym)
- [footprint](0451004-mrl.kicad_mod)
- [model 3d](models/0451004-mrl-hero.glb)
- [model 3d plain](models/0451004-mrl.glb)
- [pin mapping](pin-map.json)
- [datasheet](docs/datasheet.pdf)

The footprint uses `${KIPRJMOD}/models/Fuse_451_visual.wrl`. Place the supplied `models` folder beside your KiCad project, or update the binding to your shared library location. No global library settings are changed by these files.

## Provenance

Symbols and stock footprints originate from the KiCad 10 libraries. The fuse footprint was authored for this prototype. Package models retain the source bytes and attribution. The two illustrative models are explicitly identified as generated representations. Conversion and source hashes are recorded in [provenance](provenance/assets.json). Datasheets and third-party assets retain their original terms.

Original page documentation and project-authored library additions: CC BY 4.0. KiCad library assets: CC BY-SA 4.0 with KiCad library exception. See [LICENSE](LICENSE).