main
Ray Set visibility: public f15921c 4h ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "buk437-500a-vb",
  "title": "BUK437-500A-VB",
  "brief": "VBsemi Elec MOSFETs, TO-220AB. 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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  "component": {
    "mpn": "BUK437-500A-VB",
    "manufacturer": "VBsemi Elec",
    "package": "TO-220AB",
    "pin_count": 3,
    "category": "Triode/MOS Tube/Transistor",
    "subcategory": "MOSFETs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a695a25554792dae56b54b8a681679cb.pdf",
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      "model_3d_step": "buk437-500a-vb-etched.step",
      "model_3d_step_plain": "buk437-500a-vb.step",
      "lbr": "buk437-500a-vb.lbr"
    },
    "distributor_links": {
      "lcsc": "C20755149"
    },
    "distributor_check": {
      "checked_at": "2026-11-12T14:27:36Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "G",
        "type": "input",
        "description": "Gate terminal of the N-channel MOSFET; gate-source voltage is rated at ±30 V maximum, with threshold of 2 to 4 V at VDS = VGS, ID = 250 μA."
      },
      {
        "number": "2",
        "name": "D",
        "type": "passive",
        "description": "Drain terminal (also connected to the tab); drain-source voltage rated at 650 V maximum at TJ max, with junction-to-case (drain) thermal resistance of 0.6 °C/W max."
      },
      {
        "number": "3",
        "name": "S",
        "type": "passive",
        "description": "Source terminal of the N-channel MOSFET; body diode forward voltage is 1.5 V max at IS = 4 A, VGS = 0 V."
      }
    ],
    "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: Pin order G-D-S is taken from the 'Top View' label on page 1 and the TO-220AB outline shows pins 1 2; Datasheet text does not state the tab connection explicitly; the tab is assumed to be drain from the"
        ],
        "pages_sent": 8,
        "cost_usd": 0.0346,
        "at": "2026-11-12T14:27:28"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/a695a25554792dae56b54b8a681679cb.pdf",
        "pages": 8,
        "sha256": "2dd0232b45ecd82f",
        "source_tier": "lcsc"
      },
      "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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        "file": "buk437-500a-vb.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          10.25,
          4.455,
          28.525
        ],
        "zmin_mm": -9.75,
        "centre_offset_mm": 0.932,
        "footprint_binding": "identity",
        "sha256": "7cb065d935df5771f0ba6e48ddd180863a121af76483dad7f18e667a7b68204a",
        "checked": "2026-11-12",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "buk437-500a-vb-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
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        "zmin_mm": -9.75,
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        "sha256": "54cf9435b7f53dfa1b2970356bcce79ec30de6e1562380bd727439cbbe989039",
        "checked": "2026-11-12",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "TO-220AB",
      "source_page": 7,
      "D": {
        "nom_mm": 15.17,
        "range_mm": [
          14.85,
          15.49
        ]
      },
      "E1": {
        "nom_mm": 10.275,
        "range_mm": [
          10.04,
          10.51
        ]
      },
      "e": {
        "nom_mm": 2.54,
        "range_mm": [
          2.41,
          2.67
        ]
      },
      "A": {
        "nom_mm": 4.45,
        "range_mm": [
          4.25,
          4.65
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "buk437-500a-vb.step",
        "verdict": "PASS",
        "reasons": [
          "thickness within the datasheet's package drawing (vertical TO package)",
          "standing height not judged: the drawing read gives no overall height (H, H1 or L)"
        ],
        "by": "factory/package_fit.py"
      }
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "VBsemi Elec",
      "Package": "TO-220AB",
      "Category": "Triode/MOS Tube/Transistor",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "2dd0232b45ecd82fac471cb8633b81b608d2767e70b9a1c18673730f5707999b",
      "rows": [
        {
          "name": "Gate-Source Threshold Voltage",
          "symbol": "VGS(th)",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": 4,
          "conditions": "VDS = VGS, ID = 250 μA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Gate-Source Leakage",
          "symbol": "IGSS",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "VGS = ± 20 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Gate-Source Leakage",
          "symbol": "IGSS",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VGS = ± 30 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Zero Gate Voltage Drain Current",
          "symbol": "IDSS",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VDS = 600 V, VGS = 0 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Zero Gate Voltage Drain Current",
          "symbol": "IDSS",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "VDS = 520 V, VGS = 0 V, TJ = 125 °C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Diode Forward Voltage",
          "symbol": "VSD",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.5,
          "conditions": "TJ = 25 °C, IS = 4 A, VGS = 0 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum Junction-to-Ambient",
          "symbol": "RthJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 63,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum Junction-to-Case (Drain)",
          "symbol": "RthJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 0.6,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Drain-Source Voltage",
          "symbol": "VDS",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 650,
          "conditions": "TC = 25 °C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Gate-Source Voltage",
          "symbol": "VGS",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -30,
          "typ": null,
          "max": 30,
          "conditions": "TC = 25 °C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction and Storage Temperature Range",
          "symbol": "TJ, Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Soldering Recommendations (Peak Temperature)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "for 10 s, 1.6 mm from case",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "VDS Temperature Coefficient",
          "symbol": "ΔVDS/TJ",
          "kind": "temperature_coefficient",
          "unit": "V/°C",
          "min": null,
          "typ": 0.65,
          "max": null,
          "conditions": "Reference to 25 °C, ID = 1 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Gate Input Resistance",
          "symbol": "Rg",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 3.5,
          "max": null,
          "conditions": "f = 1 MHz, open drain",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reverse Recovery Time",
          "symbol": "trr",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 190,
          "max": null,
          "conditions": "TJ = 25 °C, IF = IS = 4 A, dI/dt = 100 A/μs, VR = 400 V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reverse Recovery Charge",
          "symbol": "Qrr",
          "kind": "electrical",
          "unit": "μC",
          "min": null,
          "typ": 2.3,
          "max": null,
          "conditions": "TJ = 25 °C, IF = IS = 4 A, dI/dt = 100 A/μs, VR = 400 V",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_pitch": "BUK437-500A-VB (VBsemi Elec) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray"
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