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Ray Set visibility: public 433758e 20h ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "1n4448",
  "title": "1N4448",
  "brief": "onsemi Diodes - General Purpose, DO-35. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "diodes",
    "1n4448",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "1N4448",
    "manufacturer": "onsemi",
    "package": "DO-35",
    "pin_count": 2,
    "category": "Diodes",
    "subcategory": "Diodes - General Purpose",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/1n4448-d.pdf",
    "parts": {
      "symbol": "1n4448.kicad_sym",
      "footprint": "1n4448.kicad_mod",
      "model_3d": "1n4448-hero.glb",
      "model_3d_step": "1n4448.step",
      "lbr": "1n4448.lbr",
      "model_3d_plain": "1n4448.glb"
    },
    "distributor_links": {
      "lcsc": "C258170",
      "digikey": "4878-1N4448CT-ND",
      "mouser": "637-1N4448"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T11:59:25Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "4878-1N4448CT-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "637-1N4448",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "K",
        "type": "passive",
        "description": "Cathode terminal, denoted by the black band on the DO-35 glass body."
      },
      {
        "number": "2",
        "name": "A",
        "type": "passive",
        "description": "Anode terminal, the axial lead at the end opposite the black cathode band."
      }
    ],
    "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",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Datasheet only states that the cathode is the black-band end of the DO-35 axial package; it prints n"
        ],
        "pages_sent": 6,
        "cost_usd": 0.0504,
        "at": "2026-10-30T11:59:11"
      },
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/1n4448-d.pdf",
        "pages": 6,
        "sha256": "b5e9fb470d755b7e",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 2,
        "described": 2,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "1n4448.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          8.12,
          2.02,
          5.01
        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "9704292191fcb13b3dfc88c1e572df18313ac20023bb230486c878d8dddfdb54",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "DO-204AH (DO-35), CASE 017AG",
      "source_page": 5,
      "D": {
        "nom_mm": 3.805,
        "range_mm": [
          3.05,
          4.56
        ]
      },
      "E1": {
        "nom_mm": 1.72,
        "range_mm": [
          1.53,
          1.91
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "1n4448.step",
        "verdict": "SKIP",
        "reasons": [
          "the datasheet dimensions give no height or body size to compare"
        ],
        "by": "factory/package_fit.py"
      }
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "DO-35",
      "Category": "Diodes",
      "Pins": "2"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "b5e9fb470d755b7e3a0a5dc934c0e61654a6815f36208c4c51191fce4262d4b6",
      "rows": [
        {
          "name": "Maximum Repetitive Reverse Voltage",
          "symbol": "VRRM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "TA = 25°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Average Rectified Forward Current",
          "symbol": "IO",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "TA = 25°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "DC Forward Current",
          "symbol": "IF",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "TA = 25°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Recurrent Peak Forward Current",
          "symbol": "If",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "TA = 25°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Non-repetitive Peak Forward Surge Current",
          "symbol": "IFSM",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "Pulse Width = 1.0 s",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Non-repetitive Peak Forward Surge Current",
          "symbol": "IFSM",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "Pulse Width = 1.0 s",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 200,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature Range",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 175,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation",
          "symbol": "PD",
          "kind": "thermal",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, Junction-to-Ambient",
          "symbol": "RJA",
          "kind": "thermal",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Breakdown Voltage",
          "symbol": "VR",
          "kind": "electrical",
          "unit": "V",
          "min": 100,
          "typ": null,
          "max": null,
          "conditions": "IR = 100 A",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Breakdown Voltage",
          "symbol": "VR",
          "kind": "electrical",
          "unit": "V",
          "min": 75,
          "typ": null,
          "max": null,
          "conditions": "IR = 5.0 A",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Forward Voltage (4448)",
          "symbol": "VF",
          "kind": "electrical",
          "unit": "V",
          "min": 0.62,
          "typ": null,
          "max": 0.72,
          "conditions": "914B / 4448, IF = 5.0 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Forward Voltage (4448)",
          "symbol": "VF",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "914B / 4448, IF = 100 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reverse Leakage",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.025,
          "conditions": "VR = 20 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reverse Leakage",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "VR = 20 V, TA = 150°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reverse Leakage",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "VR = 75 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Total Capacitance",
          "symbol": "CT",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "916/916A/916B/4448, VR = 0, f = 1.0 MHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reverse Recovery Time",
          "symbol": "trr",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "IF = 10 mA, VR = 6.0 V (600 mA), Irr = 1.0 mA, RL = 100",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "1n4448"
  ],
  "discovery_pitch": "1N4448 (onsemi) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "1n4448.kicad_sym",
    "1n4448.kicad_mod",
    "1n4448.glb",
    "1n4448.step",
    "1n4448.lbr",
    "docs/hero.png",
    "docs/1n4448-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "1n4448-hero.glb",
    "1n4448-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}