BSR58

{
  "schema_version": 1,
  "type": "component",
  "slug": "bsr58",
  "title": "BSR58",
  "brief": "onsemi JFETs, 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",
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  "component": {
    "mpn": "BSR58",
    "manufacturer": "onsemi",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Transistors/Thyristors",
    "subcategory": "JFETs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586180906667556864",
    "parts": {
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      "footprint": "bsr58.kicad_mod",
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      "model_3d_plain": "bsr58.glb",
      "model_3d_step": "bsr58-etched.step",
      "model_3d_step_plain": "bsr58.step",
      "lbr": "bsr58.lbr"
    },
    "distributor_links": {
      "lcsc": "C75909"
    },
    "pins": [
      {
        "number": "1",
        "name": "Drain",
        "type": "passive",
        "description": "Drain terminal; maximum drain-gate voltage 40V, zero-gate drain current 8-80mA at VDS=15V VGS=0V, on-state drain-source voltage 0.4V typ at ID=5mA."
      },
      {
        "number": "2",
        "name": "Source",
        "type": "passive",
        "description": "Source terminal; provides return path for drain current and serves as reference electrode for gate-source voltage measurements."
      },
      {
        "number": "3",
        "name": "Gate",
        "type": "input",
        "description": "Gate control terminal; gate-source voltage ±40V maximum, gate-source cut-off voltage 0.8-4V at VDS=15V ID=0.5nA, maximum forward gate current 50mA."
      }
    ],
    "provenance": {
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        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 5,
        "cost_usd": 0.0894,
        "at": "2026-09-22T03:38:14"
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        "pages": 5,
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        "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",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "SOT-23",
      "Category": "Transistors/Thyristors",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "1b2654931ab27882",
      "rows": [
        {
          "name": "Drain-Gate Voltage",
          "symbol": "VDGO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "",
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        },
        {
          "name": "Gate-Source Voltage",
          "symbol": "VGSO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -40,
          "typ": null,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "Forward Gate Current",
          "symbol": "IGF",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "",
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        {
          "name": "Total Power Dissipation",
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          "unit": "mW",
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          "typ": null,
          "max": 250,
          "conditions": "up to Tamb=40°C",
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        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
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        },
        {
          "name": "Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
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          "conditions": "",
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          "name": "Gate-Source Voltage",
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          "kind": "electrical",
          "unit": "V",
          "min": 40,
          "typ": null,
          "max": null,
          "conditions": "VDS = 0V, IC = 1µA",
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          "source": "datasheet"
        },
        {
          "name": "Gate Reverse Current",
          "symbol": "IGSS",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VGS = 20V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Zero-Gate Voltage Drain Current",
          "symbol": "IDSS",
          "kind": "electrical",
          "unit": "mA",
          "min": 8,
          "typ": null,
          "max": 80,
          "conditions": "VDS = 15V, VGS = 0V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Gate-Source Cut-off Voltage",
          "symbol": "VGS(off)",
          "kind": "electrical",
          "unit": "V",
          "min": 0.8,
          "typ": null,
          "max": 4,
          "conditions": "VDS = 15V, ID = 0.5nA",
          "source_page": 2,
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        },
        {
          "name": "Drain-Source On Voltage",
          "symbol": "VDS(on)",
          "kind": "electrical",
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          "max": 0.4,
          "conditions": "VGS = 0V, ID = 5mA",
          "source_page": 2,
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        },
        {
          "name": "Drain-Source On Reverse",
          "symbol": "rds(on)",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 60,
          "conditions": "VGS = 0V, ID = 0",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reverse Transfer Capacitance",
          "symbol": "Crss",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "VDS = 0V, VGS = 10V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Delay Time",
          "symbol": "td",
          "kind": "timing",
          "unit": "nS",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "VDD = 10V, VGS(on) = 0V, ID = 10mA, VGS(off) = 10V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Rise Time",
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          "kind": "timing",
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          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Turn-off Time",
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          "kind": "timing",
          "unit": "nS",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "BSR58 (onsemi) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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  "updated_at": "2026-09-24T18:10:49.673Z"
}