main
Ray Set visibility: public d484c11 3h ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "bss138lt1g-ms",
  "title": "BSS138LT1G-MS",
  "brief": "MSKSEMI MOSFETs, 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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    "triode-mos tube-transistor",
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    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "BSS138LT1G-MS",
    "manufacturer": "MSKSEMI",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Triode/MOS Tube/Transistor",
    "subcategory": "MOSFETs",
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    "parts": {
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    "distributor_links": {
      "lcsc": "C5343308"
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      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
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      {
        "number": "1",
        "name": "G",
        "type": "input",
        "description": "Gate of the N-channel MOSFET, with an embedded G-S ESD protection diode (ESD protected up to 2KV) and a VGS rating of ±20 V."
      },
      {
        "number": "2",
        "name": "S",
        "type": "passive",
        "description": "Source of the N-channel MOSFET, which is the reference terminal for VGS and carries the body diode to the drain."
      },
      {
        "number": "3",
        "name": "D",
        "type": "passive",
        "description": "Drain of the N-channel MOSFET, rated 55 V VDS and 0.3 A continuous drain current at TA=25℃."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "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: The datasheet does not print pin numbers. The package picture on page 2 labels only D (single side),",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 7,
        "cost_usd": 0.1207,
        "at": "2026-11-12T04:24:30"
      },
      "datasheet": {
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        "pages": 7,
        "sha256": "c832a03c791eb352",
        "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": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
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    "models_3d": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-11-12",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
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        "checked": "2026-11-12",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "SOT-23",
      "source_page": 6,
      "D": {
        "nom_mm": 2.9,
        "range_mm": [
          2.8,
          3
        ]
      },
      "E1": {
        "nom_mm": 1.3,
        "range_mm": [
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          1.4
        ]
      },
      "E": {
        "nom_mm": 2.4,
        "range_mm": [
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          2.55
        ]
      },
      "e": {
        "nom_mm": 0.95,
        "range_mm": [
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          null
        ]
      },
      "A": {
        "nom_mm": 1.025,
        "range_mm": [
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          1.15
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "bss138lt1g-ms.step",
        "verdict": "PASS",
        "reasons": [
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        "by": "factory/package_fit.py"
      }
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "MSKSEMI",
      "Package": "SOT-23",
      "Category": "Triode/MOS Tube/Transistor",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "c832a03c791eb352cb4f92407e489b21a89d63b6525a8335f4cc621088b6c279",
      "rows": [
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          "name": "Thermal Resistance Junction to ambient",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": null,
          "max": 357,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Drain-Source Voltage",
          "symbol": "VDS",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 55,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Gate-Source Voltage",
          "symbol": "VGS",
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          "unit": "V",
          "min": -20,
          "typ": null,
          "max": 20,
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          "source_page": 2,
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        },
        {
          "name": "Drain Current – Continuous (TA=25℃)",
          "symbol": "ID",
          "kind": "absolute_maximum",
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          "min": null,
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          "max": 0.3,
          "conditions": "TA=25℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Drain Current – Continuous (TA=70℃)",
          "symbol": "ID",
          "kind": "absolute_maximum",
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          "min": null,
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          "max": 0.16,
          "conditions": "TA=70℃",
          "source_page": 2,
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        },
        {
          "name": "Drain Current – Pulsed",
          "symbol": "IDM",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation (TA=25℃)",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 0.35,
          "conditions": "TA=25℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature Range",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Drain-Source Breakdown Voltage",
          "symbol": "BVDSS",
          "kind": "electrical",
          "unit": "V",
          "min": 55,
          "typ": null,
          "max": null,
          "conditions": "VGS=0V, ID=250uA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Drain-Source Leakage Current",
          "symbol": "IDSS",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VDS=55V, VGS=0V, TJ=25℃",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Drain-Source Leakage Current",
          "symbol": "IDSS",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "VDS=40V, VGS=0V, TJ=125℃",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Gate-Source Leakage Current",
          "symbol": "IGSS",
          "kind": "electrical",
          "unit": "uA",
          "min": -10,
          "typ": null,
          "max": 10,
          "conditions": "VGS=±20V, VDS=0V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Static Drain-Source On-Resistance",
          "symbol": "RDS(ON)",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 1.2,
          "max": 1.5,
          "conditions": "VGS=10V, ID=0.2A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Static Drain-Source On-Resistance",
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          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 1.5,
          "max": 2.5,
          "conditions": "VGS=4.5V, ID=0.1A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Gate Threshold Voltage",
          "symbol": "VGS(th)",
          "kind": "electrical",
          "unit": "V",
          "min": 0.8,
          "typ": 1.1,
          "max": 1.5,
          "conditions": "VGS=VDS, ID=250uA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Continuous Source Current",
          "symbol": "IS",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "VG=VD=0V, Force Current",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Pulsed Source Current",
          "symbol": "ISM",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 0.6,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Diode Forward Voltage",
          "symbol": "VSD",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.4,
          "conditions": "VGS=0V, IS=0.2A, TJ=25℃",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
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  "author": {
    "name": "Ray"
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