{
 "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": "rocker-switch-panel-cutouts",
 "name": "Rocker switch panel cutouts: KCD1-style 19.3 × 13, 22 × 30 mm, Carling Contura / APEM KG 36.8 × 21.1 + cutout gauge",
 "kind": "standard",
 "category": "Electronic components",
 "group": "Panel cutouts",
 "year": null,
 "question": "What panel cutout does a KCD1 rocker switch need, and what about 22 × 30 and Contura rockers?",
 "tags": [
  "rocker switch",
  "kcd1",
  "panel cutout",
  "snap-in",
  "switch",
  "enclosure",
  "mounting hole",
  "cutout gauge"
 ],
 "aliases": [
  "kcd1 rocker switch cutout",
  "rocker switch hole size",
  "19.3 x 13 rocker cutout",
  "22x30 rocker switch cutout",
  "carling contura cutout",
  "rocker switch panel thickness",
  "apem kg rocker cutout",
  "rocker switch cutout gauge stl",
  "kcd1 21x15 mm"
 ],
 "overall_mm": {
  "length": 118.1,
  "width": 38,
  "height": 2
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/rocker-switch-panel-cutouts/",
 "sheet_txt": "https://xemstudio.com/objects/rocker-switch-panel-cutouts/sheet.txt",
 "sheet": {
  "basis": "Multicomp, Multicomp Pro, Arcolectric, GEV, Carling and APEM datasheets, plus a McMaster-Carr category row; one gauge plate as a file. KCD3 and E-Switch R5 cutouts were not usable and are left out",
  "overall_mm": {
   "length": 118.1,
   "width": 38,
   "height": 2
  },
  "notes": [
   "A snap-in rocker switch fits a rectangular hole with a spring-clip body behind the panel; the hole is slightly smaller than the bezel. Rows give the maker's cutout as width × height (mm) and the panel thickness range the clips take. The page panel-cutouts already has KCD1 (19 × 13) and KCD4 (30 × 22) as rounded numbers; this page gives the maker datasheet figures and the other families.",
   "KCD1-size: Multicomp's MC36328 sheet prints a bezel of 21 × 15 mm and a cutout of 19.3 × 13 mm at 1 mm panel growing to 19.5 × 13 mm at 3 mm; Arcolectric's 8500 series prints 19.3 × 12.9 mm; McMaster's miniature rocker row reads 3/4 × 1/2 in (19.05 × 12.7 mm) from a category summary. A blog (LCSC) calls 21.2 × 15.0 mm the standard KCD1 cutout; that is the size of the bezel on the Multicomp sheet, not of the hole, so it is not used. The gauge cuts 19.3 × 13.0.",
   "22 × 30: Multicomp Pro's sheet prints 22 ± 0.1 × 30 (+0.2 / −0) mm for the standard version and 30.2 mm for the metal waterproof cap version; GEV's listing prints 30 × 22 mm. The gauge cuts 30.0 × 22.0 (the nominal).",
   "Large power rockers: Carling's Contura sheet prints one 'switch mounting hole' of 1.450 × .830 in (36.83 × 21.08 mm) for every actuator, with no label for width and height; APEM's KG sheet prints 36.80 × 21.08 mm with a 0/+0.3 tolerance (it also prints the 36.80 as '1.149 in', which is a typo for 1.449 in, so the inch figure is ignored). The gauge cuts 36.83 × 21.08 (Carling).",
   "Left out: KCD3 (LCSC titles say 30.5 × 13.5 and 13 × 30 mm and do not say whether that is the body or the hole), E-Switch R5 (the sheet read prints three cutout widths, 30.0–30.8 mm, by panel thickness band but its other cutout dimension was not captured), and the 13 × 19.2 mm size (no maker sheet reached). Panel thickness for Arcolectric 8500, GEV and McMaster was not printed in the pages read. Plate size and 2 mm thickness are Xem choices; 2 mm is within the thickness range in every row that prints one."
  ],
  "table": {
   "columns": [
    "switch",
    "bezel / body (mm)",
    "cutout W × H (mm)",
    "panel thickness (mm)",
    "source"
   ],
   "rows": [
    [
     "Multicomp MC36328 (miniature, KCD1-style)",
     "bezel 21 × 15, depth 22.7",
     "19.3 × 13 (1 mm panel) to 19.5 × 13 (3 mm panel)",
     "1–3",
     "Multicomp datasheet"
    ],
    [
     "Arcolectric (Bulgin) 8500 series",
     "—",
     "19.3 × 12.9",
     "not read",
     "Arcolectric 8500 catalogue"
    ],
    [
     "McMaster-Carr 'miniature rocker switches'",
     "—",
     "3/4 in high × 1/2 in wide (19.05 × 12.7), as read from the category page",
     "not given",
     "McMaster-Carr category"
    ],
    [
     "Multicomp Pro 22 × 30 (DPST 20 A, standard)",
     "—",
     "30 (+0.2/−0) × 22 ± 0.1",
     "0.7–3.5",
     "Multicomp Pro datasheet"
    ],
    [
     "Multicomp Pro 22 × 30 (metal waterproof cap)",
     "—",
     "30.2 × 22 (the sheet prints 30.2 for the cap version)",
     "0.7–2.5",
     "Multicomp Pro datasheet"
    ],
    [
     "GEV rocker 30 × 22 mm",
     "—",
     "30 × 22",
     "not given",
     "GEV listing"
    ],
    [
     "Carling V-Series Contura (all actuators)",
     "—",
     "36.83 × 21.08 (1.450 × .830 in; the sheet does not say which is width)",
     "0.76–6.35 (no gasket)",
     "Carling datasheet"
    ],
    [
     "APEM KG series (power rocker)",
     "—",
     "36.80 × 21.08 (0/+0.3)",
     "0.8–4.6 (2–3.5 recommended)",
     "APEM datasheet"
    ]
   ]
  }
 },
 "sheet_text": "Rocker switch panel cutouts: KCD1-style 19.3 × 13, 22 × 30 mm, Carling Contura / APEM KG 36.8 × 21.1 + cutout gauge — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/rocker-switch-panel-cutouts/  (sheet CC BY 4.0)\nBasis: Multicomp, Multicomp Pro, Arcolectric, GEV, Carling and APEM datasheets, plus a McMaster-Carr category row; one gauge plate as a file. KCD3 and E-Switch R5 cutouts were not usable and are left out\nCatalog version: 2026-10-20\n\nOverall (mm): length 118.1, width 38.0, height 2.0\n- A snap-in rocker switch fits a rectangular hole with a spring-clip body behind the panel; the hole is slightly smaller than the bezel. Rows give the maker's cutout as width × height (mm) and the panel thickness range the clips take. The page panel-cutouts already has KCD1 (19 × 13) and KCD4 (30 × 22) as rounded numbers; this page gives the maker datasheet figures and the other families.\n- KCD1-size: Multicomp's MC36328 sheet prints a bezel of 21 × 15 mm and a cutout of 19.3 × 13 mm at 1 mm panel growing to 19.5 × 13 mm at 3 mm; Arcolectric's 8500 series prints 19.3 × 12.9 mm; McMaster's miniature rocker row reads 3/4 × 1/2 in (19.05 × 12.7 mm) from a category summary. A blog (LCSC) calls 21.2 × 15.0 mm the standard KCD1 cutout; that is the size of the bezel on the Multicomp sheet, not of the hole, so it is not used. The gauge cuts 19.3 × 13.0.\n- 22 × 30: Multicomp Pro's sheet prints 22 ± 0.1 × 30 (+0.2 / −0) mm for the standard version and 30.2 mm for the metal waterproof cap version; GEV's listing prints 30 × 22 mm. The gauge cuts 30.0 × 22.0 (the nominal).\n- Large power rockers: Carling's Contura sheet prints one 'switch mounting hole' of 1.450 × .830 in (36.83 × 21.08 mm) for every actuator, with no label for width and height; APEM's KG sheet prints 36.80 × 21.08 mm with a 0/+0.3 tolerance (it also prints the 36.80 as '1.149 in', which is a typo for 1.449 in, so the inch figure is ignored). The gauge cuts 36.83 × 21.08 (Carling).\n- Left out: KCD3 (LCSC titles say 30.5 × 13.5 and 13 × 30 mm and do not say whether that is the body or the hole), E-Switch R5 (the sheet read prints three cutout widths, 30.0–30.8 mm, by panel thickness band but its other cutout dimension was not captured), and the 13 × 19.2 mm size (no maker sheet reached). Panel thickness for Arcolectric 8500, GEV and McMaster was not printed in the pages read. Plate size and 2 mm thickness are Xem choices; 2 mm is within the thickness range in every row that prints one.\n\nswitch  bezel / body (mm)  cutout W × H (mm)  panel thickness (mm)  source\nMulticomp MC36328 (miniature, KCD1-style)  bezel 21 × 15, depth 22.7  19.3 × 13 (1 mm panel) to 19.5 × 13 (3 mm panel)  1–3  Multicomp datasheet\nArcolectric (Bulgin) 8500 series  —  19.3 × 12.9  not read  Arcolectric 8500 catalogue\nMcMaster-Carr 'miniature rocker switches'  —  3/4 in high × 1/2 in wide (19.05 × 12.7), as read from the category page  not given  McMaster-Carr category\nMulticomp Pro 22 × 30 (DPST 20 A, standard)  —  30 (+0.2/−0) × 22 ± 0.1  0.7–3.5  Multicomp Pro datasheet\nMulticomp Pro 22 × 30 (metal waterproof cap)  —  30.2 × 22 (the sheet prints 30.2 for the cap version)  0.7–2.5  Multicomp Pro datasheet\nGEV rocker 30 × 22 mm  —  30 × 22  not given  GEV listing\nCarling V-Series Contura (all actuators)  —  36.83 × 21.08 (1.450 × .830 in; the sheet does not say which is width)  0.76–6.35 (no gasket)  Carling datasheet\nAPEM KG series (power rocker)  —  36.80 × 21.08 (0/+0.3)  0.8–4.6 (2–3.5 recommended)  APEM datasheet\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Multicomp (via Farnell): MC36328 miniature rocker switch: bezel 21 x 15 mm, cut-out 19.3 x 13 mm min at 1 mm to 19.5 x 13 mm at 3 mm, panel 1 to 3 mm — web — Maker datasheet; numbers only — https://www.farnell.com/datasheets/1662750.pdf\n- Arcolectric (Bulgin) via DirectIndustry: 8500 series miniature rockers: panel cut-out 19.3 x 12.9 mm — web — Maker catalogue; numbers only — https://pdf.directindustry.com/pdf/arcolectric/8500/9337-583668.html\n- Multicomp Pro (via Farnell): 22 mm x 30 mm rocker, DPST 20 A: cut-out 22 ± 0.1 x 30 (+0.2/-0) mm, panel 0.7 to 3.5 mm (metal waterproof cap: 30.2 mm, 0.7 to 2.5 mm) — web — Maker datasheet; numbers only — https://www.farnell.com/datasheets/3626657.pdf\n- GEV: Rocker switch 30 x 22 mm, 2CO 250 V, faston 6.3: mounting measurements 30 x 22 mm — web — Maker page; numbers only — https://www.gev-online.com/en/webshop/product/301004\n- Carling Technologies: V-Series Contura datasheet: switch mounting hole 1.450 x .830 in (36.83 x 21.08 mm), panel .030 to .250 in without gasket — web — Maker datasheet; numbers only — https://www.mouser.com/datasheet/2/65/V-Series-XIV_datasheet-357257.pdf\n- APEM (via Chipsmall): KG series power rocker (SW-KG-1801): panel cut-out 36.80 x 21.08 mm (0/+0.3), panel 0.8 to 4.6 mm, recommended 2 to 3.5 mm — web — Maker datasheet; numbers only — https://datasheet.chipsmall.com/KG312A2XXA/657534.pdf\n- LCSC: KCD1 and KCD2 rocker switches guide: standard KCD1 panel cutout 21.2 x 15.0 mm (disagrees with the maker datasheets; not used) — web — Blog; one figure checked, not used — https://www.lcsc.com/blog/kcd1-switches-rocker-switches-guide/\n- McMaster-Carr: Lighted rocker switches (rockers, toggles, lever switches) (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/lighted-rocker-switches/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/rocker-switch-panel-cutouts/index.json\nAPI: https://xemstudio.com/api/geometry?object=rocker-switch-panel-cutouts\n",
 "sources": [
  {
   "publisher": "Multicomp (via Farnell)",
   "title": "MC36328 miniature rocker switch: bezel 21 x 15 mm, cut-out 19.3 x 13 mm min at 1 mm to 19.5 x 13 mm at 3 mm, panel 1 to 3 mm",
   "url": "https://www.farnell.com/datasheets/1662750.pdf",
   "formats": [
    "web"
   ],
   "license": "Maker datasheet; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Arcolectric (Bulgin) via DirectIndustry",
   "title": "8500 series miniature rockers: panel cut-out 19.3 x 12.9 mm",
   "url": "https://pdf.directindustry.com/pdf/arcolectric/8500/9337-583668.html",
   "formats": [
    "web"
   ],
   "license": "Maker catalogue; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Multicomp Pro (via Farnell)",
   "title": "22 mm x 30 mm rocker, DPST 20 A: cut-out 22 ± 0.1 x 30 (+0.2/-0) mm, panel 0.7 to 3.5 mm (metal waterproof cap: 30.2 mm, 0.7 to 2.5 mm)",
   "url": "https://www.farnell.com/datasheets/3626657.pdf",
   "formats": [
    "web"
   ],
   "license": "Maker datasheet; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "GEV",
   "title": "Rocker switch 30 x 22 mm, 2CO 250 V, faston 6.3: mounting measurements 30 x 22 mm",
   "url": "https://www.gev-online.com/en/webshop/product/301004",
   "formats": [
    "web"
   ],
   "license": "Maker page; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Carling Technologies",
   "title": "V-Series Contura datasheet: switch mounting hole 1.450 x .830 in (36.83 x 21.08 mm), panel .030 to .250 in without gasket",
   "url": "https://www.mouser.com/datasheet/2/65/V-Series-XIV_datasheet-357257.pdf",
   "formats": [
    "web"
   ],
   "license": "Maker datasheet; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "APEM (via Chipsmall)",
   "title": "KG series power rocker (SW-KG-1801): panel cut-out 36.80 x 21.08 mm (0/+0.3), panel 0.8 to 4.6 mm, recommended 2 to 3.5 mm",
   "url": "https://datasheet.chipsmall.com/KG312A2XXA/657534.pdf",
   "formats": [
    "web"
   ],
   "license": "Maker datasheet; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "LCSC",
   "title": "KCD1 and KCD2 rocker switches guide: standard KCD1 panel cutout 21.2 x 15.0 mm (disagrees with the maker datasheets; not used)",
   "url": "https://www.lcsc.com/blog/kcd1-switches-rocker-switches-guide/",
   "formats": [
    "web"
   ],
   "license": "Blog; one figure checked, not used",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Lighted rocker switches (rockers, toggles, lever switches) (free STEP/IGES per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/lighted-rocker-switches/",
   "formats": [
    "STEP",
    "IGES",
    "PDF"
   ],
   "license": "McMaster-Carr site terms: personal design use, no redistribution",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "panel-cutouts",
  "wall-plate-decora-us",
  "wall-plate-toggle-us",
  "adafruit-buttons-joysticks-encoders",
  "cable-glands-pg-thread",
  "rubber-grommets-panel-hole",
  "faston-quick-connect-tabs",
  "glass-cartridge-fuses-5x20-and-6-3x32"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no tolerance added)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no tolerance added. 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. Typical accuracy by process and ISO 286 fits: https://xemstudio.com/tolerances/",
 "mating": [
  {
   "feature": "cutout",
   "exact": "19.3 × 13 (to 19.5 × 13 at 3 mm panel) KCD1 style; 30 (+0.2/−0) × 22 ±0.1; 36.83 × 21.08 (Carling); 36.80 × 21.08 (0/+0.3, APEM)",
   "mates": "panel thickness 1–3 / 0.7–3.5 / 0.76–6.35 / 0.8–4.6",
   "fit": "designed",
   "files": "rocker-cutout-gauge"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. ISO 286 equivalent: H7/p6 (locational interference) or tighter.",
  "slide": "assembles by hand and is held by a grub, pinch or clamp: shaft in a hub, rod in a socket, spigot in a bore. ISO 286 equivalent: H7/g6 or H7/h6.",
  "run": "turns or slides in use: pin in a link, rod through a guide. ISO 286 equivalent: H8/f7 (close running).",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. ISO 286 equivalent: H9/d9 (free running) or looser.",
  "clamp": "split part that closes on the mating part with screws: make it at size.",
  "designed": "a gap that is part of the design (piston fit option, displacer gap, air gap): do not change."
 },
 "faq": [
  {
   "q": "What size hole does a KCD1 rocker need?",
   "a": "About 19.3 × 13 mm per Multicomp's MC36328 sheet (bezel 21 × 15), in a 1–3 mm panel."
  },
  {
   "q": "What is the cutout for a 22 × 30 rocker?",
   "a": "22 ± 0.1 × 30 (+0.2/−0) mm per Multicomp Pro; 30.2 mm for the metal waterproof cap version."
  },
  {
   "q": "What is the Carling Contura mounting hole?",
   "a": "1.450 × .830 in (36.83 × 21.08 mm); APEM's KG prints 36.80 × 21.08 mm."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "rocker-cutout-gauge-19x13-30x22-37x21",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/rocker-switch-panel-cutouts/rocker-cutout-gauge-19x13-30x22-37x21.step",
   "stl": "https://xemstudio.com/files/hardware/rocker-switch-panel-cutouts/rocker-cutout-gauge-19x13-30x22-37x21.stl",
   "note": "cutout gauge plate, 118.1 × 38.0 × 2 mm, three rectangular holes: 19.3 × 13.0 mm (Multicomp MC36328 miniature rocker, KCD1-size), 30.0 × 22.0 mm (Multicomp Pro 22 × 30 rocker) and 36.83 × 21.08 mm (Carling Contura mounting hole, 1.450 × .830 in); plate size and 2 mm thickness are Xem choices (2 mm is inside every maker's published thickness range)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/rocker-switch-panel-cutouts/index.md"
}