component
04511.25MRL
Public Unreviewedby John Lauer
Littelfuse 451 series very fast acting fuse, 1.25A 125V
← Commit history
Add exact orderable part identity and reusable unmarked package CAD
9 files changed
+267−36
LICENSEadded+9@@ -0,0 +1,9 @@+MIT License++Copyright (c) 2026 Adom contributors++Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files, to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies, and to permit persons to whom the Software is furnished to do so, subject to inclusion of this notice.++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR ITS USE.++Third-party KiCad CAD files are excluded from this grant: CC-BY-SA 4.0 with KiCad library exception. See https://www.kicad.org/libraries/license/ and the original STEP header.
README.md+12−1@@ -1,3 +1,14 @@ # 04511.25MRL -Littelfuse 451 series very fast acting fuse, 1.25A 125V+Littelfuse 451 series very fast acting fuse, 1.25A 125V.++[Manufacturer datasheet](https://www.littelfuse.com/assetdocs/fuse-451-and-453-datasheet?assetguid=533cd5cc-956c-4243-867f-6ab5a62f6ba1) ยท [Mouser listing](https://www.mouser.com/en/ProductDetail/Littelfuse/04511.25MRL?qs=8QfiMw8FY5O0yGQ%2F2f7lqw%3D%3D). Quote retrieved 2026-10-17: $2.24 each, 2,088 in stock; prices and stock can change.++| Pin | Function |+|---|---|+| 1 | 1 |+| 2 | 2 |++Original simplified dimensioned 451-series body; not manufacturer CAD. No current marking is represented. Native assembly and polarity inspection remain required. CAD contains no application circuit.++Apply the manufacturer's 25% continuous-current derating in addition to its ambient-temperature rerating curve. Review breaking capacity against the actual fault source; voltage/current ratings alone do not establish coordination.
component.kicad_modadded+1@@ -0,0 +1 @@+(footprint "04511-25mrl" (version 20240108) (generator pcbnew) (layer "F.Cu") (attr smd) (descr "Original land pattern from Littelfuse 451/453 recommended layout; 6.86 total, 2.95 gap, 3.15 width mm") (fp_text reference "REF**" (at 0 -2.5) (layer "F.SilkS") (effects (font (size 1 1) (thickness 0.15)))) (fp_text value "0451" (at 0 2.5) (layer "F.Fab") (effects (font (size 1 1) (thickness 0.15)))) (fp_rect (start -3.05 -1.345) (end 3.05 1.345) (stroke (width 0.1) (type default)) (fill none) (layer "F.Fab")) (fp_rect (start -3.7 -1.85) (end 3.7 1.85) (stroke (width 0.05) (type default)) (fill none) (layer "F.CrtYd")) (pad "1" smd roundrect (at -2.4525 0) (size 1.955 3.15) (layers "F.Cu" "F.Paste" "F.Mask") (roundrect_rratio 0.1)) (pad "2" smd roundrect (at 2.4525 0) (size 1.955 3.15) (layers "F.Cu" "F.Paste" "F.Mask") (roundrect_rratio 0.1)) (model "${KIPRJMOD}/package-reference.step" (offset (xyz 0 0 0)) (scale (xyz 1 1 1)) (rotate (xyz 0 0 0))))
component.kicad_symadded+1@@ -0,0 +1 @@+(kicad_symbol_lib (version 20231120) (generator kicad_symbol_editor) (symbol "04511.25MRL" (in_bom yes) (on_board yes) (property "Reference" "F" (at 0 5.08 0) (effects (font (size 1.27 1.27)))) (property "Value" "04511.25MRL" (at 0 -5.08 0) (effects (font (size 1.27 1.27)))) (property "Footprint" "04511-25mrl:04511-25mrl" (at 0 0 0) (effects (font (size 1.27 1.27)) hide)) (symbol "04511.25MRL_0_1" (polyline (pts (xy -7.62 0.0) (xy -3.81 0.0)) (stroke (width 0.254) (type default)) (fill (type none))) (polyline (pts (xy -3.81 -1.27) (xy 3.81 -1.27) (xy 3.81 1.27) (xy -3.81 1.27) (xy -3.81 -1.27)) (stroke (width 0.254) (type default)) (fill (type none))) (polyline (pts (xy 3.81 0.0) (xy 7.62 0.0)) (stroke (width 0.254) (type default)) (fill (type none))) (polyline (pts (xy -3.81 0.0) (xy 3.81 0.0)) (stroke (width 0.254) (type default)) (fill (type none)))) (symbol "04511.25MRL_1_1" (pin passive line (at -10.16 0.0 0) (length 2.54) (name "1" (effects (font (size 1 1)))) (number "1" (effects (font (size 1 1))))) (pin passive line (at 10.16 0.0 180) (length 2.54) (name "2" (effects (font (size 1 1)))) (number "2" (effects (font (size 1 1)))))) (pin_names (offset 0) hide)))
hero.pngadded⋯ 1 unchanged line ⋯
package-reference.glbadded⋯ 1 unchanged line ⋯
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page.json+33−35@@ -1,46 +1,44 @@ {- "schema_version": 1,- "slug": "04511-25mrl",- "type": "component",+ "type": "hardware",+ "kind": "component", "title": "04511.25MRL", "brief": "Littelfuse 451 series very fast acting fuse, 1.25A 125V", "version": "0.1.0",- "kind": "component", "component": { "mpn": "04511.25MRL",- "manufacturer": "",- "package": "",- "pin_count": null,- "category": "",- "subcategory": "",- "body_size": null,- "parts": {},+ "manufacturer": "Littelfuse",+ "package": "451 Nano2",+ "source": {+ "name": "Littelfuse",+ "url": "https://www.littelfuse.com/assetdocs/fuse-451-and-453-datasheet?assetguid=533cd5cc-956c-4243-867f-6ab5a62f6ba1"+ },+ "pins": [+ {+ "number": "1",+ "name": "1"+ },+ {+ "number": "2",+ "name": "2"+ }+ ],+ "pin_count": 2, "distributor_links": { "mouser": "576-04511.25MRL"+ },+ "parts": {+ "symbol": "component.kicad_sym",+ "footprint": "component.kicad_mod",+ "model_3d": "package-reference.glb",+ "step": "package-reference.step"+ },+ "provenance": {+ "geometry_status": "Original simplified dimensioned 451-series body; not manufacturer CAD. No current marking is represented.",+ "native_import": "development asset, assembly qualification pending" } },- "source": {- "tool": "Littelfuse",- "url": "https://www.littelfuse.com/assetdocs/fuse-451-and-453-datasheet?assetguid=533cd5cc-956c-4243-867f-6ab5a62f6ba1"- }, "hero": {- "type": "billboard",- "headline": "04511.25MRL",- "subhead": "Littelfuse 451 series very fast acting fuse, 1.25A 125V"- },- "author": {- "name": "John Lauer",- "email": "[email protected]"- },- "tags": [],- "license": "proprietary",- "visibility": {- "public": true- },- "sample_prompts": [],- "discovery_triggers": [],- "discovery_pitch": null,- "metadata": {},- "created_at": "2026-10-17T21:03:03.727Z",- "updated_at": "2026-10-17T21:03:03.727Z"-}+ "type": "image",+ "path": "hero.png"+ }+}
provenance.jsonadded+4@@ -0,0 +1,4 @@+{+ "manufacturer_reference": "https://www.littelfuse.com/assetdocs/fuse-451-and-453-datasheet?assetguid=533cd5cc-956c-4243-867f-6ab5a62f6ba1",+ "geometry": "Original simplified dimensioned 451-series body; not manufacturer CAD. No current marking is represented."+}