TL431M-A

{
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  "type": "component",
  "slug": "tl431m-a",
  "title": "TL431M-A",
  "brief": "Foshan Blue Rocket Elec Voltage Reference, 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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    "power management (pmic)",
    "tl431m-a",
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  "component": {
    "mpn": "TL431M-A",
    "manufacturer": "Foshan Blue Rocket Elec",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586200496184414208",
    "parts": {
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      "footprint": "tl431m-a.kicad_mod",
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      "model_3d_plain": "tl431m-a.glb",
      "model_3d_step": "tl431m-a-etched.step",
      "model_3d_step_plain": "tl431m-a.step",
      "lbr": "tl431m-a.lbr"
    },
    "distributor_links": {
      "lcsc": "C305439"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T11:07:52Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "R",
        "type": "input",
        "description": "Reference input of the adjustable shunt regulator, with a nominal reference voltage of 2.495 V and a continuous reference input current rating of 0.05 to +10 mA."
      },
      {
        "number": "2",
        "name": "K",
        "type": "passive",
        "description": "Cathode of the shunt regulator, with a continuous cathode current range of -100 to +100 mA and a cathode-to-anode voltage rating of 37 V maximum."
      },
      {
        "number": "3",
        "name": "A",
        "type": "passive",
        "description": "Anode of the shunt regulator; the datasheet gives the cathode-to-anode voltage rating of 37 V but does not state a separate anode limit."
      }
    ],
    "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 pinout is taken from the TL431M datasheet (Rev.F, Apr-2017, Foshan Blue Rocket). The datasheet d; Pin 1 is printed as 'R' (reference) and not as the more common 'REF' label; pin mapping is taken fro; The datasheet gives no explicit pin type classification; the KiCad ERC types (input for R, passive f"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0275,
        "at": "2026-10-09T11:05:34"
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      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586200496184414208",
        "pages": 7,
        "sha256": "588d6cfc6c617cfc",
        "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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        "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": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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      {
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        "zmin_mm": 0,
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        "sha256": "3c1fc838463bfeb66ddf7f5d576d37bc45bb5696a5ad0919db58a6fa9257cff4",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Foshan Blue Rocket Elec",
      "Package": "SOT-23",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "588d6cfc6c617cfc",
      "rows": [
        {
          "name": "Reference Input Voltage (A grade, 0.5%)",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 2.483,
          "typ": 2.495,
          "max": 2.507,
          "conditions": "VKA=VREF IK=10mA (A=0.5%)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Deviation of Reference Input Voltage Over Temperature",
          "symbol": "ΔVREF/ΔT",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 4.5,
          "max": 25,
          "conditions": "VKA=VREF IK=10mA TA=-40～125℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Ratio of Change in Reference Input Voltage to Change in Cathode Voltage (10V to VREF)",
          "symbol": "ΔVREF/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
          "max": -2.7,
          "conditions": "IK=10mA, ΔVKA=10V to VREF",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Ratio of Change in Reference Input Voltage to Change in Cathode Voltage (36V to 10V)",
          "symbol": "ΔVREF/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -0.5,
          "max": -2,
          "conditions": "IK=10mA, ΔVKA=36V to 10V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Current",
          "symbol": "IREF",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.8,
          "max": 1,
          "conditions": "IK=10mA R1=10KΩ R2=open",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Deviation of Reference Input Current Over Full Temperature Range",
          "symbol": "ΔIREF/ΔT",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.4,
          "max": 1.2,
          "conditions": "IK=10mA R1=10KΩ R2=open TA=-40～125℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Minimum Cathode Current for Regulation",
          "symbol": "IK(min)",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.05,
          "max": 0.08,
          "conditions": "VKA=VREF",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Off-state Cathode Current",
          "symbol": "IK(off)",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.05,
          "max": 1,
          "conditions": "VKA=36V VREF=0V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Dynamic Impedance",
          "symbol": "|ZKA|",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.15,
          "max": 0.5,
          "conditions": "VKA=VREF f≤1.0KHz IK=1mA to 100mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Cathode to Anode Voltage",
          "symbol": "VKA",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 37,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Cathode Current Range, Continuous",
          "symbol": "IK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -100,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Current Range, Continuous",
          "symbol": "IREF",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": 0.05,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 370,
          "conditions": "Ta=25℃ (absolute maximum ratings header)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Ambient Temperature",
          "symbol": "Tamb",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "Tj",
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          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "TL431M-A (Foshan Blue Rocket Elec) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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