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Ray Set visibility: public 5e006cf 6h ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "1n4370",
  "title": "1N4370",
  "brief": "Microchip Tech Zener Diodes, DO-35. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.",
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    "package": "DO-35",
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    "subcategory": "Zener Diodes",
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      "model_3d_step": "1n4370.step",
      "lbr": "1n4370.lbr",
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      "mouser": "494-1N4370"
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    "distributor_check": {
      "checked_at": "2026-10-31T01:37:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
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      "mouser": {
        "pn": "494-1N4370",
        "status": "found"
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    },
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        "type": "passive",
        "description": "Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint."
      },
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        "consensus_model": null,
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "vision extraction: provenance cannot be text-verified; needs consensus"
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        "cost_usd": 0.0013,
        "at": "2026-10-31T01:36:45"
      },
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        "pages": 3,
        "sha256": "c7e4020fcb968bf9",
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        "refuses_to_fabricate": true
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        "role": "plain",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
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        "zmin_mm": -2.5,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "9704292191fcb13b3dfc88c1e572df18313ac20023bb230486c878d8dddfdb54",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "DO-35",
      "Category": "Diodes",
      "Pins": "2"
    },
    "appearance": {
      "contacts": {
        "quote": "• TERMINALS: Tin-Lead or RoHS Compliant annealed matte-Tin plating solderable per MIL￾STD-750, method 2026",
        "page": 1,
        "doc": "ds.pdf",
        "plating": "tin"
      },
      "housing": {
        "quote": "C) 3/8” FROM BODY or NOMINAL ZENER VOLTAGE (VOLTS) TA on FR4 PC BOARD",
        "page": 2,
        "doc": "ds.pdf",
        "material": "PC"
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      "version": 1,
      "datasheet_sha256": "c7e4020fcb968bf9a1c56d261a5b7898a9f48e0c275d30e5470048637d9559ff"
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    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "c7e4020fcb968bf9a1c56d261a5b7898a9f48e0c275d30e5470048637d9559ff",
      "rows": [
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          "name": "Zener voltage tolerance (no suffix, standard)",
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          "kind": "tolerance",
          "unit": "%",
          "min": -10,
          "typ": null,
          "max": 10,
          "conditions": "Standard tolerance, no suffix letter (A = ±5%, C = ±2%, D = ±1%)",
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          "source": "datasheet"
        },
        {
          "name": "Maximum reverse current @25°C",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "VR = 1 V, 25°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum reverse current @+150°C",
          "symbol": "IR",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "VR = 1 V, +150°C",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum zener impedance",
          "symbol": "ZZT",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "@ IZT = 20 mA, 60 Hz ac at 10% IZT (note 3)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum zener current",
          "symbol": "IZM",
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          "unit": "mA",
          "min": null,
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          "conditions": "Note 4: allowance for power dissipation of 400 mW",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating and storage temperature",
          "symbol": "Tj/Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 175,
          "conditions": "Operating and storage temperature",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Steady-state power",
          "symbol": "P",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "TL < 50°C, 3/8 inch (10 mm) from body; 0.48 W at TA < 25°C on FR4 PC board",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Solder temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
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          "max": 260,
          "conditions": "10 s (max)",
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        {
          "name": "Nominal zener voltage",
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          "max": null,
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          "source": "datasheet"
        },
        {
          "name": "Typical temperature coefficient of zener voltage",
          "symbol": "αVZ",
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          "unit": "%/°C",
          "min": null,
          "typ": -0.085,
          "max": null,
          "conditions": "Typical, @ IZT = 20 mA",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction to lead",
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          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 250,
          "max": null,
          "conditions": "3/8 inch (10 mm) lead length from body",
          "source_page": 1,
          "source": "datasheet"
        },
        {
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          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 310,
          "max": null,
          "conditions": "Mounted on FR4 PC board (1 oz Cu), 4 mm² copper pads, track width 1 mm, length 25 mm",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Forward voltage",
          "symbol": "VF",
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          "unit": "V",
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          "typ": 1.1,
          "max": null,
          "conditions": "@ IF = 200 mA",
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          "source": "datasheet"
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  },
  "variants": [],
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "1N4370 (Microchip Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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  "visibility": {
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}