{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "alps-skcm-skcl-plate-cutout-and-pcb-footprint",
 "name": "Alps SKCM / SKCL switch: plate cutout and PCB footprint",
 "kind": "standard",
 "category": "Computers & desk",
 "group": "Keyboard switches & stabilizers",
 "year": null,
 "question": "What size is the Alps switch plate cutout and where are its PCB holes?",
 "tags": [
  "keyboard",
  "mechanical keyboard",
  "alps",
  "matias",
  "switch",
  "plate",
  "pcb",
  "footprint",
  "vintage keyboard"
 ],
 "aliases": [
  "alps plate cutout",
  "alps switch cutout 15.5 x 12.8",
  "skcm cutout",
  "skcl footprint",
  "alps pcb holes",
  "matias plate cutout",
  "alps switch dimensions",
  "alps plate thickness"
 ],
 "overall_mm": {
  "length": 19.05,
  "width": 19.05,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 2,
 "url": "https://xemstudio.com/objects/alps-skcm-skcl-plate-cutout-and-pcb-footprint/",
 "sheet_txt": "https://xemstudio.com/objects/alps-skcm-skcl-plate-cutout-and-pcb-footprint/sheet.txt",
 "sheet": {
  "basis": "Alps SKCL/SKCM datasheet (mounting-panel hole drawing, panel t1.2, PCB mounting holes); key pitch and pin split from the KiCad SW_Matias_1.00u footprint",
  "overall_mm": {
   "length": 19.05,
   "width": 19.05,
   "height": null
  },
  "notes": [
   "Alps SKCM / SKCL ('complicated' and 'simplified' Alps) switches and their clones (Matias, many vintage boards) clip into a 15.5 × 12.8 mm rectangular plate hole in a 1.2 mm plate, wider than tall, and have two Ø1.5 pins.",
   "Holes are seen from the switch mounting side, origin on the key centre, x to the right, y up: the pins are 5 mm apart, pin 1 at 4.5 mm and pin 2 at 4.0 mm above the key centre. Alps dimensions the 5 mm spacing; the ±2.5 split about the key centre is confirmed by the KiCad Matias/Alps footprint.",
   "The plate tile is the 19.05 mm key footprint; the cutout is at true size with square corners as Alps draws it."
  ],
  "table": {
   "columns": [
    "parameter",
    "value"
   ],
   "rows": [
    [
     "plate (panel) cutout",
     "15.5 × 12.8 mm (15.5 across, 12.8 up)"
    ],
    [
     "plate thickness",
     "t1.2 mm"
    ],
    [
     "pin 1 (x, y)",
     "Ø1.5 at (+2.5, +4.5) mm"
    ],
    [
     "pin 2 (x, y)",
     "Ø1.5 at (-2.5, +4.0) mm"
    ],
    [
     "key pitch (1u)",
     "19.05 mm"
    ]
   ]
  }
 },
 "sheet_text": "Alps SKCM / SKCL switch: plate cutout and PCB footprint — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/alps-skcm-skcl-plate-cutout-and-pcb-footprint/  (sheet CC BY 4.0)\nBasis: Alps SKCL/SKCM datasheet (mounting-panel hole drawing, panel t1.2, PCB mounting holes); key pitch and pin split from the KiCad SW_Matias_1.00u footprint\nCatalog version: 2026-10-20\n\nOverall (mm): length 19.05, width 19.05\n- Alps SKCM / SKCL ('complicated' and 'simplified' Alps) switches and their clones (Matias, many vintage boards) clip into a 15.5 × 12.8 mm rectangular plate hole in a 1.2 mm plate, wider than tall, and have two Ø1.5 pins.\n- Holes are seen from the switch mounting side, origin on the key centre, x to the right, y up: the pins are 5 mm apart, pin 1 at 4.5 mm and pin 2 at 4.0 mm above the key centre. Alps dimensions the 5 mm spacing; the ±2.5 split about the key centre is confirmed by the KiCad Matias/Alps footprint.\n- The plate tile is the 19.05 mm key footprint; the cutout is at true size with square corners as Alps draws it.\n\nparameter  value\nplate (panel) cutout  15.5 × 12.8 mm (15.5 across, 12.8 up)\nplate thickness  t1.2 mm\npin 1 (x, y)  Ø1.5 at (+2.5, +4.5) mm\npin 2 (x, y)  Ø1.5 at (-2.5, +4.0) mm\nkey pitch (1u)  19.05 mm\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Alps Alpine: SKCL/SKCM series push switch datasheet: mounting-panel hole drawing, panel t1.2, PCB mounting holes — web — Maker datasheet (linked, not rehosted) — https://github.com/keyboardio/keyswitch_documentation/blob/master/datasheets/ALPS/SKCL.pdf\n- KiCad: kicad-footprints: Button_Switch_Keyboard.pretty (SW_Cherry_MX_1.00u_PCB fixing pegs; SW_Matias_1.00u Alps-type pin positions) — web — CC BY-SA 4.0 with KiCad exception (footprints) — https://github.com/KiCad/kicad-footprints/tree/master/Button_Switch_Keyboard.pretty\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 2 parts): https://xemstudio.com/files/hardware/alps-skcm-skcl-plate-cutout-and-pcb-footprint/index.json\nAPI: https://xemstudio.com/api/geometry?object=alps-skcm-skcl-plate-cutout-and-pcb-footprint\n",
 "sources": [
  {
   "publisher": "Alps Alpine",
   "title": "SKCL/SKCM series push switch datasheet: mounting-panel hole drawing, panel t1.2, PCB mounting holes",
   "url": "https://github.com/keyboardio/keyswitch_documentation/blob/master/datasheets/ALPS/SKCL.pdf",
   "formats": [
    "web"
   ],
   "license": "Maker datasheet (linked, not rehosted)",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "KiCad",
   "title": "kicad-footprints: Button_Switch_Keyboard.pretty (SW_Cherry_MX_1.00u_PCB fixing pegs; SW_Matias_1.00u Alps-type pin positions)",
   "url": "https://github.com/KiCad/kicad-footprints/tree/master/Button_Switch_Keyboard.pretty",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 with KiCad exception (footprints)",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "cherry-mx-switch-plate-cutout-and-pcb-footprint",
  "kailh-choc-v1-v2-pcb-footprint"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [],
 "faq": [
  {
   "q": "What size hole does an Alps switch need?",
   "a": "15.5 × 12.8 mm in a 1.2 mm plate (Alps SKCL/SKCM datasheet)."
  },
  {
   "q": "Where are the Alps switch pins?",
   "a": "Two Ø1.5 holes 5 mm apart: (+2.5, +4.5) and (−2.5, +4.0) mm from the key centre, seen from the mounting side."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "alps-plate-1u",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/alps-skcm-skcl-plate-cutout-and-pcb-footprint/alps-plate-1u.step",
   "stl": "https://xemstudio.com/files/hardware/alps-skcm-skcl-plate-cutout-and-pcb-footprint/alps-plate-1u.stl",
   "note": "1u plate square 19.05 × 19.05 × 1.2 mm with the 15.5 × 12.8 mm Alps switch cutout, true size"
  },
  {
   "file": "alps-pcb-footprint",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/alps-skcm-skcl-plate-cutout-and-pcb-footprint/alps-pcb-footprint.step",
   "stl": "https://xemstudio.com/files/hardware/alps-skcm-skcl-plate-cutout-and-pcb-footprint/alps-pcb-footprint.stl",
   "note": "Alps SKCM/SKCL PCB holes as a 1.6 mm drill jig: 2 × Ø1.5, 5 mm apart, 4.5 and 4.0 mm above the key centre, true size"
  }
 ],
 "markdown": "https://xemstudio.com/objects/alps-skcm-skcl-plate-cutout-and-pcb-footprint/index.md"
}