{
 "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": "wiznet-ethernet-hat-w5100s",
 "name": "WIZnet Ethernet HAT (W5100S) for Raspberry Pi Pico: 68 × 21 mm board and RJ45 jack position",
 "kind": "modern",
 "category": "Electronic components",
 "group": "Modules, sensors & displays",
 "year": null,
 "question": "What are the WIZnet Ethernet HAT dimensions and where is the RJ45 jack?",
 "tags": [
  "wiznet ethernet hat",
  "pico ethernet",
  "w5100s",
  "rj45 module",
  "pico hat"
 ],
 "aliases": [
  "WIZnet Ethernet HAT",
  "wiznet w5100s",
  "wiznet ethernet hat",
  "W5100S Ethernet HAT for Pico",
  "raspberry pi pico ethernet hat",
  "wiznet ethernet hat dimensions"
 ],
 "overall_mm": {
  "length": 72.9,
  "width": 21,
  "height": 14.35
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/wiznet-ethernet-hat-w5100s/",
 "sheet_txt": "https://xemstudio.com/objects/wiznet-ethernet-hat-w5100s/sheet.txt",
 "sheet": {
  "basis": "WIZnet Ethernet HAT V1.0.0 Gerber files and the UDE RB1-125BAG1A RJ45 datasheet.",
  "overall_mm": {
   "length": 72.9,
   "width": 21,
   "height": 14.35
  },
  "notes": [
   "Datum: board centred on X and Y, bottom on z=0, components on top; −X is the RJ45 end.",
   "Board 68.0 × 21.0 × 1.0 mm, square corners, no mounting holes (it stacks on the Pico via two 1×20 2.54 mm headers along the ±Y edges).",
   "RJ45 jack 21.79 × 15.75, x −38.9..−17.11, centred in Y, top 13.35 above the board; its front face overhangs the −X board edge by 4.9.",
   "Overall 72.9 long including the RJ45 overhang, 14.35 high.",
   "Not modelled: the headers, W5100S IC and passives. Exact nominal mm."
  ]
 },
 "sheet_text": "WIZnet Ethernet HAT (W5100S) for Raspberry Pi Pico: 68 × 21 mm board and RJ45 jack position — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/wiznet-ethernet-hat-w5100s/  (sheet CC BY 4.0)\nBasis: WIZnet Ethernet HAT V1.0.0 Gerber files and the UDE RB1-125BAG1A RJ45 datasheet.\nCatalog version: 2026-10-20\n\nOverall (mm): length 72.9, width 21.0, height 14.35\n- Datum: board centred on X and Y, bottom on z=0, components on top; −X is the RJ45 end.\n- Board 68.0 × 21.0 × 1.0 mm, square corners, no mounting holes (it stacks on the Pico via two 1×20 2.54 mm headers along the ±Y edges).\n- RJ45 jack 21.79 × 15.75, x −38.9..−17.11, centred in Y, top 13.35 above the board; its front face overhangs the −X board edge by 4.9.\n- Overall 72.9 long including the RJ45 overhang, 14.35 high.\n- Not modelled: the headers, W5100S IC and passives. Exact nominal mm.\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- WIZnet: WIZnet Ethernet HAT documentation — web — Publisher's page; dimensions are facts — https://docs.wiznet.io/Product/Open-Source-Hardware/wiznet_ethernet_hat\n- UDE / Chipsmall: RB1-125BAG1A RJ45 datasheet — web — Publisher's page; dimensions are facts — https://datasheet.chipsmall.com/RB1-125BAG1A/329978.pdf\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/wiznet-ethernet-hat-w5100s/index.json\nAPI: https://xemstudio.com/api/geometry?object=wiznet-ethernet-hat-w5100s\n",
 "sources": [
  {
   "publisher": "WIZnet",
   "title": "WIZnet Ethernet HAT documentation",
   "url": "https://docs.wiznet.io/Product/Open-Source-Hardware/wiznet_ethernet_hat",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "UDE / Chipsmall",
   "title": "RB1-125BAG1A RJ45 datasheet",
   "url": "https://datasheet.chipsmall.com/RB1-125BAG1A/329978.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "raspberry-pi-pico",
  "raspberry-pi-pico-2",
  "micro-usb-mini-usb-receptacles",
  "pin-headers-2.54mm",
  "adafruit-picowbell-pico-accessories"
 ],
 "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": "RJ45 jack",
   "exact": "15.75 wide × 13.35 above board, face 4.9 past −X edge",
   "mates": "RJ45 panel cutout / Ethernet plug",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "Pico headers",
   "exact": "2 × 1×20, 2.54 pitch along ±Y edges",
   "mates": "Raspberry Pi Pico pins",
   "fit": "socket",
   "files": "all"
  }
 ],
 "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": "How big is the WIZnet Ethernet HAT?",
   "a": "68.0 × 21.0 mm board; 72.9 mm long and 14.35 mm high including the RJ45 jack."
  },
  {
   "q": "How far does the RJ45 stick out?",
   "a": "Its front face is 4.9 mm past the board edge; the jack is 15.75 mm wide and 13.35 mm above the board."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "wiznet-ethernet-hat-w5100s",
   "formats": [
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    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/wiznet-ethernet-hat-w5100s/wiznet-ethernet-hat-w5100s.step",
   "stl": "https://xemstudio.com/files/hardware/wiznet-ethernet-hat-w5100s/wiznet-ethernet-hat-w5100s.stl",
   "note": "WIZnet Ethernet HAT (W5100S) for Raspberry Pi Pico: 68 × 21 mm board and RJ45 jack position"
  }
 ],
 "markdown": "https://xemstudio.com/objects/wiznet-ethernet-hat-w5100s/index.md"
}