component
0451004.MRL | Fuse
Public UnreviewedLittelfuse 0451004.MRL: fuse, 4A / 125V. Reusable KiCad symbol, footprint, and provisional package model.
← Commit history
Publish provisional exact-part KiCad library and source provenance
14 files changed
+685−1
0451004-mrl.kicad_mod+10451004-mrl.kicad_sym+1LICENSE+3README.md+54−1docs/0451004_MRL_unit1.svg+435docs/datasheet.pdfdocs/hero.pngmodels/0451004-mrl-hero.glbmodels/0451004-mrl-hero.overlay.json+125models/0451004-mrl.glbmodels/Fuse_451_visual.wrl+4pin-map.json+21provenance/assets.json+40provenance/hero-build.log+10451004-mrl.kicad_modadded+1@@ -0,0 +1 @@+(footprint "0451004-mrl" (layer "F.Cu") (attr smd) (property "Reference" "REF**" (at 0 -3 0) (layer "F.Fab") (effects (font (size 1.0 1.0)))) (property "Value" "0451004.MRL" (at 0 3.5) (layer "F.Fab") (effects (font (size 1.0 1.0)))) (fp_rect (start -4.1 -1.8) (end 4.1 1.8) (stroke (width 0.05) (type default)) (fill none) (layer "F.CrtYd")) (pad "1" smd rect (at -2.54 0) (size 2.54 3.05) (layers "F.Cu" "F.Paste" "F.Mask")) (pad "2" smd rect (at 2.54 0) (size 2.54 3.05) (layers "F.Cu" "F.Paste" "F.Mask")) (model "${KIPRJMOD}/models/Fuse_451_visual.wrl" (offset (xyz 0 0 0)) (scale (xyz 1 1 1)) (rotate (xyz 0 0 0))))
0451004-mrl.kicad_symadded+1@@ -0,0 +1 @@+(kicad_symbol_lib (version 20250114) (generator "kicad_symbol_editor") (symbol "0451004_MRL" (pin_numbers (hide yes)) (pin_names (offset 0)) (exclude_from_sim no) (in_bom yes) (on_board yes) (in_pos_files yes) (duplicate_pin_numbers_are_jumpers no) (property "Reference" "F" (at 2.032 0 90) (show_name no) (do_not_autoplace no) (effects (font (size 1.27 1.27)))) (property "Value" "0451004.MRL" (at -1.905 0 90) (show_name no) (do_not_autoplace no) (effects (font (size 1.27 1.27)))) (property "Footprint" "0451004-mrl:0451004-mrl" (at -1.778 0 90) (show_name no) (do_not_autoplace no) (hide yes) (effects (font (size 1.27 1.27)))) (property "Datasheet" "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588894527024848896" (at 0 0 0) (show_name no) (do_not_autoplace no) (hide yes) (effects (font (size 1.27 1.27)))) (property "Description" "Fuse" (at 0 0 0) (show_name no) (do_not_autoplace no) (hide yes) (effects (font (size 1.27 1.27)))) (property "ki_keywords" "fuse" (at 0 0 0) (show_name no) (do_not_autoplace no) (hide yes) (effects (font (size 1.27 1.27)))) (property "ki_fp_filters" "*Fuse*" (at 0 0 0) (show_name no) (do_not_autoplace no) (hide yes) (effects (font (size 1.27 1.27)))) (symbol "0451004_MRL_0_1" (rectangle (start -0.762 -2.54) (end 0.762 2.54) (stroke (width 0.254) (type default)) (fill (type none))) (polyline (pts (xy 0 2.54) (xy 0 -2.54)) (stroke (width 0) (type default)) (fill (type none)))) (symbol "0451004_MRL_1_1" (pin passive line (at 0 3.81 270) (length 1.27) (name "" (effects (font (size 1.27 1.27)))) (number "1" (effects (font (size 1.27 1.27))))) (pin passive line (at 0 -3.81 90) (length 1.27) (name "" (effects (font (size 1.27 1.27)))) (number "2" (effects (font (size 1.27 1.27)))))) (embedded_fonts no) (property "MPN" "0451004.MRL" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes))) (property "Manufacturer" "Littelfuse" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes))) (property "Mouser" "576-0451004.MRL" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes))) (property "DigiKey" "F2586TR-ND" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes))) (property "LCSC" "C27515" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes))) (property "Nominal" "4A / 125V" (at 0 0 0) (effects (font (size 1.27 1.27)) (hide yes)))))
LICENSEadded+3@@ -0,0 +1,3 @@+Original documentation and project-authored additions: Creative Commons Attribution 4.0 International. https://creativecommons.org/licenses/by/4.0/+KiCad library symbols, footprints and stock 3D models retain CC BY-SA 4.0 with the KiCad library exception: https://www.kicad.org/libraries/license/+Manufacturer datasheets retain their original copyright and terms. No manufacturer CAD authorship or certification is claimed for generic or illustrative models.
README.md+54−1@@ -1,3 +1,56 @@ # 0451004.MRL | Fuse -Littelfuse 0451004.MRL: fuse, 4A / 125V. Reusable KiCad symbol, footprint, and provisional package model.+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).
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models/0451004-mrl-hero.overlay.jsonadded+125@@ -0,0 +1,125 @@+{+ "spec": "adom-hero 1.4",+ "mpn": "0451004.MRL",+ "kind": "component + footprint reference art",+ "board_use": false,+ "plane_z_mm": -0.02,+ "units": "metre",+ "upAxis": "Z",+ "layers": {+ "pad_outlines": {+ "material": "Footprint pads - teal dashed outlines - 50 percent opacity",+ "rgba": [+ 0.0,+ 0.902,+ 0.863,+ 0.5+ ],+ "pads": 2,+ "span_mm": 7.62,+ "dash_mm": 0.1905,+ "gap_mm": 0.1143,+ "pad_stroke_mm": 0.0457+ },+ "silkscreen": {+ "material": "Silkscreen reference lines - 30 percent opacity",+ "rgba": [+ 0.92,+ 0.96,+ 1.0,+ 0.3+ ],+ "footprint_items": 0,+ "pin1": null+ },+ "signal_names": {+ "material": "Signal names - 50 percent opacity",+ "rgba": [+ 0.92,+ 0.96,+ 1.0,+ 0.5+ ],+ "font": "DejaVu Sans Mono",+ "labels": 2,+ "sides": "top + mirrored underside (single-sided)",+ "omitted": null,+ "fallback_to_pad_number": 2+ }+ },+ "align": {+ "ok": true,+ "centre_offset_mm": 0.0,+ "tolerance_mm": 0.61,+ "orientation_flipped": false,+ "contacts_bbox_mm": [+ -3.05,+ 3.05,+ -1.375,+ 1.375+ ],+ "pads_bbox_mm": [+ -3.81,+ 3.81,+ -1.525,+ 1.525+ ],+ "seating_z_mm": 0.05+ },+ "sources": {+ "glb": "0451004-mrl.glb",+ "glb_sha256": "5c53fe627e04a8788988e0833db3476abc69fabe5b91987e104c8fb6c933f2fd",+ "footprint": "0451004-mrl.kicad_mod",+ "footprint_sha256": "9d68c1ae40c7dcca2f9786c0f0776385e784f81a65b75374827c87b405a4db7b",+ "pins": "page.json component.pins"+ },+ "generator": "factory/hero_glb.py",+ "labels": [+ {+ "pad": "1",+ "text": "1",+ "x": -3.96,+ "y": 0.0,+ "align": "right",+ "vertical": false,+ "h": 0.6+ },+ {+ "pad": "2",+ "text": "2",+ "x": 3.96,+ "y": 0.0,+ "align": "left",+ "vertical": false,+ "h": 0.6+ }+ ],+ "pads": [+ {+ "number": "1",+ "shape": "rect",+ "center_mm": [+ -2.54,+ 0.0+ ],+ "size_mm": [+ 2.54,+ 3.05+ ],+ "rot": 0.0+ },+ {+ "number": "2",+ "shape": "rect",+ "center_mm": [+ 2.54,+ 0.0+ ],+ "size_mm": [+ 2.54,+ 3.05+ ],+ "rot": 0.0+ }+ ]+}
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models/Fuse_451_visual.wrladded+4@@ -0,0 +1,4 @@+#VRML V2.0 utf8+Transform { translation 0.0 0.0 0.5511811023622046 children [ Shape { appearance Appearance { material Material { diffuseColor 0.88 0.86 0.73 } } geometry Box { size 2.401574803149606 1.0590551181102361 1.0236220472440944 } } ] }+Transform { translation -0.984251968503937 0.0 0.5511811023622046 children [ Shape { appearance Appearance { material Material { diffuseColor 0.7 0.7 0.73 } } geometry Box { size 0.4330708661417323 1.0826771653543308 1.062992125984252 } } ] }+Transform { translation 0.984251968503937 0.0 0.5511811023622046 children [ Shape { appearance Appearance { material Material { diffuseColor 0.7 0.7 0.73 } } geometry Box { size 0.4330708661417323 1.0826771653543308 1.062992125984252 } } ] }
pin-map.jsonadded+21@@ -0,0 +1,21 @@+{+ "mpn": "0451004.MRL",+ "pins": [+ {+ "number": "1",+ "name": "1",+ "type": "passive"+ },+ {+ "number": "2",+ "name": "2",+ "type": "passive"+ }+ ],+ "mapping": {+ "1": "1",+ "2": "2"+ },+ "source": "KiCad 10 stock symbols and footprints; package-specific pin/pad mapping retained from the project",+ "qualification": "Parser and pin-number set checks only; manufacturer package drawing sign-off is pending."+}
provenance/assets.jsonadded+40@@ -0,0 +1,40 @@+{+ "mpn": "0451004.MRL",+ "created": "2026-10-11",+ "model_representation": "Illustrative generated package; not manufacturer mechanical CAD",+ "model_source": {+ "file": "models/Fuse_451_visual.wrl",+ "sha256": "07f580a16f81468721cc3d1242abcaa1f48a47605d595411198b521e56a9f6d8",+ "authority": "Project-authored illustrative VRML"+ },+ "datasheet": {+ "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588894527024848896",+ "valid_pdf": true,+ "retrieved": "2026-10-11",+ "sha256": "ade583d66dc303591035fa92a9f3874828f567f59a3cb4f5d24984c3de96ea87",+ "bytes": 879459+ },+ "symbol_source": "Device:Fuse",+ "footprint_source": "JetsonBuck:Fuse_451",+ "pin_pad_set_match": true,+ "model_conversion": "Existing illustrative VRML Box nodes translated without geometry changes using trimesh; 0.1 inch to metres",+ "mechanical_validation": "Not performed; generic/illustrative library record",+ "files": {+ "pin-map.json": "fda78a5f0fb2a2527a511c1a4f307f14f6918da91a4a93237c55bde65b8f6bdb",+ "0451004-mrl.kicad_sym": "5caa1a61ac7c9f8dfafddb6d5639aa9bec1b859f6136e17a769469f41249d198",+ "page.json": "aeda50a6c6f13c02e796ab84170fa760e2ebe232c8521720fa8c5f81b50b515f",+ "README.md": "eb760798db5a4972802638b8ac6e24cbecf6ec4cd38ee3c2102590b96cf12a0b",+ "LICENSE": "37fba400dc8ff2f96d2a5e60e63d26aca4f66450724c897a844415b9fda177e3",+ "0451004-mrl.kicad_mod": "9d68c1ae40c7dcca2f9786c0f0776385e784f81a65b75374827c87b405a4db7b",+ "provenance/hero-build.log": "3429fbaf0cf1a72a95c000eef807d974cd3ab3594992f1c256f5afc55f942d2a",+ "models/0451004-mrl-hero.glb": "f968dd57dc274d0f2d8e015e892bdc3fc5e481ef0f87bc41d81510ee7a146f84",+ "models/0451004-mrl-hero.overlay.json": "c1b2ee41d9f316a417f017fed2eb49d11ff32665818f14da74883afc8e328a55",+ "models/0451004-mrl.glb": "5c53fe627e04a8788988e0833db3476abc69fabe5b91987e104c8fb6c933f2fd",+ "models/Fuse_451_visual.wrl": "07f580a16f81468721cc3d1242abcaa1f48a47605d595411198b521e56a9f6d8",+ "docs/0451004_MRL_unit1.svg": "19b707f5d479a79ab807abcb8e1d96d956fac3fba3330283859077e107f9a24e",+ "docs/hero.png": "1c635fd96c99169d427aa3188195f0d04a13b3873962d23695f00b7a6b71a7b6",+ "docs/datasheet.pdf": "ade583d66dc303591035fa92a9f3874828f567f59a3cb4f5d24984c3de96ea87"+ },+ "hero_generator": "adom/component-hero 1.4; local preview-only changes: 16:10 canvas and provisional-status heading",+ "native_symbol_parser": "KiCad 10.0.3 SVG export passed"+}
provenance/hero-build.logadded+1@@ -0,0 +1 @@+OK /home/adom/project/jetson-6s-buck/wiki-publication/pages/0451004-mrl/models/0451004-mrl-hero.glb: pads 2, silk items 0, pin1 none, labels 2; align OK (offset 0.0 mm)