PC817B-MS

{
  "slug": "pc817b-ms",
  "version": "0.1.0",
  "type": "component",
  "description": "MSKSEMI Transistor, Photovoltaic Output Optoisolators, DIP-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "optoisolators",
    "pc817b-ms",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "pc817b-ms.kicad_sym",
    "pc817b-ms.kicad_mod",
    "pc817b-ms.glb",
    "pc817b-ms.step",
    "pc817b-ms.lbr",
    "docs/hero.png",
    "docs/pc817b-ms-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "pc817b-ms-hero.glb",
    "pc817b-ms-hero.overlay.json",
    "pc817b-ms-etched.glb"
  ],
  "component": {
    "mpn": "PC817B-MS",
    "manufacturer": "MSKSEMI",
    "package": "DIP-4",
    "pin_count": 4,
    "category": "Optoisolators",
    "subcategory": "Transistor, Photovoltaic Output Optoisolators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603066765706338304",
    "parts": {
      "symbol": "pc817b-ms.kicad_sym",
      "footprint": "pc817b-ms.kicad_mod",
      "model_3d": "pc817b-ms-hero.glb",
      "model_3d_plain": "pc817b-ms-etched.glb",
      "model_3d_step": "pc817b-ms-etched.step",
      "model_3d_step_plain": "pc817b-ms.step",
      "lbr": "pc817b-ms.lbr"
    },
    "distributor_links": {
      "lcsc": "C7472815"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T17:52:18Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Anode",
        "type": "input",
        "description": "Anode of the input GaAs LED; forward current IF max 50 mA, reverse voltage VR max 6 V, VF typ 1.20 V at IF=20 mA."
      },
      {
        "number": "2",
        "name": "Cathode",
        "type": "input",
        "description": "Cathode of the input GaAs LED, returned to the input-side ground; IF max 50 mA, VR max 6 V."
      },
      {
        "number": "3",
        "name": "Emitter",
        "type": "passive",
        "description": "Emitter of the NPN phototransistor output; VECO (emitter-collector) max 6 V."
      },
      {
        "number": "4",
        "name": "Collector",
        "type": "passive",
        "description": "Collector of the NPN phototransistor output; VCEO max 35 V, collector current IC max 50 mA."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin-to-function mapping read from the schematic (frame structure) drawing on page 2, which shows 1 a; The datasheet gives VCEO max as 35 V in the absolute maximum ratings but lists BVCEO min as 70 V and; The pin electrical types for the optocoupler terminals (input vs passive) are a judgement call, sinc",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 9,
        "cost_usd": 0.2273,
        "at": "2026-10-18T17:50:12"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603066765706338304",
        "pages": 9,
        "sha256": "13e738f0b46732ff",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 4,
        "described": 4,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "pc817b-ms.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          4.93,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "39490b2c17b5f36ae3fdd5fdd2952f6879a060ff6cbc6d0241e3d6262fd0f215",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "pc817b-ms-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          4.93,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "0e3e80f29406d5903297f7eb20c302041945d115ceee7f7dbd78b646b40c91a9",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}