main
Ray Set visibility: public e52b08f 7d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "2sa1721-o",
  "title": "2SA1721-O",
  "brief": "TOSHIBA Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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  ],
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    "subcategory": "Bipolar (BJT)",
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      "footprint": "2sa1721-o.kicad_mod",
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      "model_3d_plain": "2sa1721-o-etched.glb",
      "model_3d_step": "2sa1721-o-etched.step",
      "model_3d_step_plain": "2sa1721-o.step",
      "lbr": "2sa1721-o.lbr"
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    "distributor_links": {
      "lcsc": "C150150"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T22:49:49Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
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        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
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        "type": "input",
        "description": "Base terminal; emitter-base voltage limited to -5 V and base current to -20 mA maximum."
      },
      {
        "number": "2",
        "name": "EMITTER",
        "type": "passive",
        "description": "Emitter terminal of the PNP transistor; collector-emitter voltage rating is -300 V."
      },
      {
        "number": "3",
        "name": "COLLECTOR",
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        "description": "Collector terminal; collector current up to -100 mA, collector-base voltage -300 V, power dissipation 150 mW."
      }
    ],
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        "extractor": "extract_pins 0.3",
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        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Package is S-MINI (SC-59, TO-236MOD) per the datasheet, which is SOT-23-like but not identical to th",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 5,
        "cost_usd": 0.2044,
        "at": "2026-10-17T22:47:33"
      },
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        "pages": 5,
        "sha256": "823f1dd837fc60f0",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
    },
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "2sa1721-o-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "sha256": "2ac771337ca191d513d5311f995b54564d24803fb477e06910b96a54fb82d366",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "TOSHIBA",
      "Package": "SOT-23",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    },
    "appearance": {
      "housing": {
        "quote": "Base current IB −20 mA Collector power dissipation PC 150 mW",
        "page": 1,
        "doc": "ds.pdf",
        "material": "PC"
      },
      "version": 1,
      "datasheet_sha256": "823f1dd837fc60f07ae1945b0bb7dac740c5c6a9388f1a8530924aa8a3c2f8be"
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      "source": "datasheet",
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          "symbol": "ICBO",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": -0.1,
          "conditions": "VCB = −300 V, IE = 0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Emitter cut-off current",
          "symbol": "IEBO",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": -0.1,
          "conditions": "VEB = −5 V, IC = 0",
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          "source": "datasheet"
        },
        {
          "name": "Collector-base breakdown voltage",
          "symbol": "V (BR) CBO",
          "kind": "electrical",
          "unit": "V",
          "min": -300,
          "typ": null,
          "max": null,
          "conditions": "IC = −0.1 mA, IE = −0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter breakdown voltage",
          "symbol": "V (BR) CEO",
          "kind": "electrical",
          "unit": "V",
          "min": -300,
          "typ": null,
          "max": null,
          "conditions": "IC = −1 mA, IB = −0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "DC current gain, O classification",
          "symbol": "hFE (1)",
          "kind": "electrical",
          "unit": "",
          "min": 50,
          "typ": null,
          "max": 150,
          "conditions": "VCE = −10 V, IC = −20 mA; O-grade range per note",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "DC current gain",
          "symbol": "hFE (2)",
          "kind": "electrical",
          "unit": "",
          "min": 20,
          "typ": null,
          "max": null,
          "conditions": "VCE = −10 V, IC = −1 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-emitter saturation voltage",
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          "kind": "electrical",
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          "min": null,
          "typ": null,
          "max": -0.5,
          "conditions": "IC = −20 mA, IB = −2 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
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          "min": null,
          "typ": null,
          "max": -1.2,
          "conditions": "IC = −20 mA, IB = −2 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Transition frequency",
          "symbol": "fT",
          "kind": "electrical",
          "unit": "MHz",
          "min": 50,
          "typ": 55,
          "max": null,
          "conditions": "VCE = −10 V, IC = −20 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector output capacitance",
          "symbol": "Cob",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 5.5,
          "max": 6,
          "conditions": "VCB = −20 V, IE = 0, f = 1 MHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-base voltage",
          "symbol": "VCBO",
          "kind": "absolute_maximum",
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          "max": -300,
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        },
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          "name": "Collector-emitter voltage",
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          "symbol": "VEBO",
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          "min": null,
          "typ": null,
          "max": -5,
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          "name": "Collector current",
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          "unit": "mA",
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          "typ": null,
          "max": -100,
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          "name": "Base current",
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          "min": null,
          "typ": null,
          "max": -20,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "Collector power dissipation",
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          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature",
          "symbol": "Tj",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
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          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
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          "conditions": "",
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          "source": "datasheet"
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      ]
    }
  },
  "variants": [],
  "sections": [
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  ],
  "discovery_triggers": [
    "2sa1721-o"
  ],
  "discovery_pitch": "2SA1721-O (TOSHIBA) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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  }
}