main
Ray Set visibility: public c7222ea 17d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "bc857b-r1-00001",
  "title": "BC857B_R1_00001",
  "brief": "PANJIT International 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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    "transistors-thyristors",
    "bc857b_r1_00001",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "BC857B_R1_00001",
    "manufacturer": "PANJIT International",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "Bipolar (BJT)",
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    "parts": {
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      "lbr": "bc857b-r1-00001.lbr"
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    "distributor_links": {
      "lcsc": "C6751499"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T19:04:17Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
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        "status": "quota"
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      "mouser": {
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        "status": "quota"
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        "name": "Base",
        "type": "input",
        "description": "Base terminal of the PNP transistor, with the emitter-base voltage limited to -5 V (VEBO) per the absolute ratings."
      },
      {
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      },
      {
        "number": "3",
        "name": "Collector",
        "type": "passive",
        "description": "Collector terminal of the PNP transistor; for the BC857 device the collector-emitter voltage is -45 V and the continuous collector current is -100 mA (peak -200 mA)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet is the BC856 series (PNP, SOT-23). The MPN BC857B_R1_00001 is covered by the device ma; Pin assignments were taken from the text-extracted 'Top View' diagram (3 Collector, 1 Base, 2 Emitte; The datasheet gives no dedicated spec field requested by the schema; the collector and emitter descr"
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        "cost_usd": 0.0278,
        "at": "2026-10-17T19:02:05"
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        "pages": 5,
        "sha256": "b768e2b14ba986ca",
        "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
      }
    },
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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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          3,
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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)"
      },
      {
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        "sha256": "ab9b2960fc365b42f6c5bc97d6f917f98fbd711e37368261cdf46ea6b57b82c5",
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  "metadata": {
    "specs": {
      "Manufacturer": "PANJIT International",
      "Package": "SOT-23",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "b768e2b14ba986ca03ef9efd5206c562a1ff885f3fdf1e3a981e05e501dbe051",
      "rows": [
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          "name": "Collector - Emitter Breakdown Voltage (BC857A,B,C)",
          "symbol": "V(BR)CEO",
          "kind": "electrical",
          "unit": "V",
          "min": -45,
          "typ": null,
          "max": null,
          "conditions": "IC=-10mA, IB=0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector - Base Breakdown Voltage (BC857A,B,C)",
          "symbol": "V(BR)CBO",
          "kind": "electrical",
          "unit": "V",
          "min": -50,
          "typ": null,
          "max": null,
          "conditions": "IC =-10μA, IE=0",
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        },
        {
          "name": "Emitter - Base Breakdown Voltage",
          "symbol": "V(BR)EBO",
          "kind": "electrical",
          "unit": "V",
          "min": -5,
          "typ": null,
          "max": null,
          "conditions": "IE=-1μA, IC =0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Emitter-Base Cutoff Current",
          "symbol": "IEBO",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": -100,
          "conditions": "VEB=-5V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector-Base Cutoff Current",
          "symbol": "ICBO",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": -15,
          "conditions": "VCB=-30V, IE=0",
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        },
        {
          "name": "Collector-Base Cutoff Current (TJ=150°C)",
          "symbol": "ICBO",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": -4,
          "conditions": "VCB=-30V, IE=0, TJ=150°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "DC Current Gain (BC857B group)",
          "symbol": "hFE",
          "kind": "electrical",
          "unit": "",
          "min": 150,
          "typ": null,
          "max": null,
          "conditions": "IC=-10μA, VCE=-5V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "DC Current Gain (BC857B group)",
          "symbol": "hFE",
          "kind": "electrical",
          "unit": "",
          "min": 180,
          "typ": 290,
          "max": 520,
          "conditions": "IC=-2mA, VCE=-5V",
          "source_page": 2,
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        },
        {
          "name": "Collector - Emitter Saturation Voltage",
          "symbol": "VCE(SAT)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -0.3,
          "conditions": "IC=-10mA, IB=-0.5mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector - Emitter Saturation Voltage",
          "symbol": "VCE(SAT)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -0.65,
          "conditions": "IC=-100mA, IB=-5mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Base - Emitter Saturation Voltage",
          "symbol": "VBE(SAT)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": -0.7,
          "max": null,
          "conditions": "IC=-10mA, IB=-0.5mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Base - Emitter Saturation Voltage",
          "symbol": "VBE(SAT)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -0.9,
          "conditions": "IC=-100mA, IB=-5mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Base - Emitter On Voltage",
          "symbol": "VBE(ON)",
          "kind": "electrical",
          "unit": "V",
          "min": -0.6,
          "typ": null,
          "max": -0.75,
          "conditions": "IC=-2mA, VCE=-5V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Base - Emitter On Voltage",
          "symbol": "VBE(ON)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -0.82,
          "conditions": "IC=-10mA, VCE=-5V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector - Base Capacitance",
          "symbol": "CCB",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 4.5,
          "conditions": "VCB=-10V, IE=0, f=1MHz",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Collector - Emitter Voltage (BC857)",
          "symbol": "VCEO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -45,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector - Base Voltage (BC857)",
          "symbol": "VCBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -50,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Emitter - Base Voltage",
          "symbol": "VEBO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -5,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Collector Current - Continuous",
          "symbol": "IC",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": -100,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Peak Collector Current",
          "symbol": "ICM",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": -200,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Max Power Dissipation",
          "symbol": "PTOT",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 330,
          "conditions": "Transistor mounted on FR-4 board 8 cm2 (Note 1)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction and Storage Temperature Range",
          "symbol": "TJ,TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -50,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Typical Thermal Resistance, Junction to Ambient",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 375,
          "max": null,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_pitch": "BC857B_R1_00001 (PANJIT International) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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