PC817

{
  "schema_version": 1,
  "type": "component",
  "slug": "pc817",
  "title": "PC817",
  "brief": "Sharp phototransistor optocoupler, DIP-4. 5.0 kVrms isolation, IRED + NPN phototransistor. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "optocoupler",
    "photocoupler",
    "isolation",
    "dip-4",
    "sharp"
  ],
  "component": {
    "mpn": "PC817",
    "manufacturer": "Sharp",
    "package": "DIP-4",
    "pin_count": 4,
    "category": "Optocoupler",
    "subcategory": "Phototransistor optocoupler",
    "datasheet": "https://www.farnell.com/datasheets/73758.pdf",
    "parts": {
      "symbol": "pc817.kicad_sym",
      "footprint": "pc817.kicad_mod",
      "model_3d": "pc817-etched.glb",
      "model_3d_plain": "pc817.glb",
      "lbr": "pc817.lbr",
      "model_3d_step": "pc817-etched.step",
      "model_3d_step_plain": "pc817.step"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "ANODE",
        "type": "passive",
        "description": "Anode of the input-side infrared LED (IRED). Drive with forward current I_F (typical operating 5 mA, absolute max 50 mA DC / 1 A peak, 100 us / 0.001 duty). Forward voltage V_F ~= 1.2 V typ (1.4 V max) at I_F = 20 mA. Use a series resistor to limit current."
      },
      {
        "number": "2",
        "name": "CATHODE",
        "type": "passive",
        "description": "Cathode of the input-side infrared LED. Return path for the LED forward current; reverse voltage V_R rated 6 V max. Typically tied to the input-side ground/return."
      },
      {
        "number": "3",
        "name": "EMITTER",
        "type": "passive",
        "description": "Emitter of the output-side NPN phototransistor. Usually tied to the output-side ground (common-emitter) or drives a load in common-collector configuration. Rated V_ECO = 6 V."
      },
      {
        "number": "4",
        "name": "COLLECTOR",
        "type": "passive",
        "description": "Collector of the output-side NPN phototransistor. Photocurrent flows here when the input LED is driven; conducts to the emitter in proportion to LED current per the CTR (50-600% at I_F = 5 mA, V_CE = 5 V). V_CEO = 80 V, I_C = 50 mA max, V_CE(sat) = 0.1 V typ (0.2 V max) at I_F = 20 mA, I_C = 1 mA."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.farnell.com/datasheets/73758.pdf",
        "pages": 15,
        "sha256": "a485f78cde6091c8",
        "source_tier": "cse"
      },
      "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": "pc817.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,
        "footprint_binding": "identity",
        "sha256": "39490b2c17b5f36ae3fdd5fdd2952f6879a060ff6cbc6d0241e3d6262fd0f215",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "pc817-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,
        "footprint_binding": "identity",
        "sha256": "89a1b28b3cb988f664a3136a54c719a7b16d64e616a19c63a00745fbe42014ed",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Phototransistor optocoupler",
      "Isolation voltage": "5.0 kVrms",
      "Input": "Infrared LED (Vf ~1.2 V, IF 50 mA max)",
      "Output": "NPN phototransistor (VCEO 35 V, IC 50 mA)",
      "Current transfer ratio (CTR)": "50-600% (ranked)",
      "Isolation": "Galvanic input-to-output",
      "Package": "DIP-4",
      "Body (L×W×H)": "6.5 × 4.6 × 3.5 mm"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "pc817",
    "optocoupler",
    "photocoupler dip-4",
    "galvanic isolation opto"
  ],
  "discovery_pitch": "Sharp PC817 phototransistor optocoupler (DIP-4) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "pc817.kicad_sym",
    "pc817.kicad_mod",
    "pc817.glb",
    "pc817.lbr",
    "docs/hero.png",
    "docs/pc817-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "pc817-etched.step"
  ],
  "variants": [
    {
      "mpn": "PC817X (DIP-4)",
      "kind": "packaging"
    },
    {
      "mpn": "PC817C (DIP-4, CTR rank C)",
      "kind": "packaging"
    }
  ]
}