Q24FA20H00428

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  "title": "Q24FA20H00428",
  "brief": "Seiko Epson Crystals, SMD2520-4P. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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    "mpn": "Q24FA20H00428",
    "manufacturer": "Seiko Epson",
    "package": "SMD2520-4P",
    "pin_count": 4,
    "category": "Crystals/Oscillators/Resonators",
    "subcategory": "Crystals",
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    "distributor_links": {
      "lcsc": "C255962"
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      "source": "Component Ocean /api/assign-pns",
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        "status": "no match"
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      "mouser": {
        "pn": null,
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    "pins": [
      {
        "number": "1",
        "name": "#1",
        "type": "passive",
        "description": "Pin #1 is one of the two crystal terminals in the internal connection diagram; the datasheet does not name its function or state electrical limits for it."
      },
      {
        "number": "2",
        "name": "#2",
        "type": "power_in",
        "description": "Pin #2 is connected to the case and the datasheet instructs that it be grounded (请接地)."
      },
      {
        "number": "3",
        "name": "#3",
        "type": "passive",
        "description": "Pin #3 is the other crystal terminal in the internal connection diagram; the datasheet does not name its function or state electrical limits for it."
      },
      {
        "number": "4",
        "name": "#4",
        "type": "power_in",
        "description": "Pin #4 is connected to the case and the datasheet instructs that it be grounded (请接地)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
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        "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 datasheet shows the internal connection diagram with pins #1 to #4 but does not explicitly name ; The text says #2 and #4 are connected to the case and should be grounded, but does not label them as; Datasheet gives the 2.5 x 2.0 x 0.55 mm outline and the product number pattern Q24FA20H0xxxx00 for t"
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        "at": "2026-10-21T07:07:24"
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        "pages": 2,
        "sha256": "7bb713f5fda96562",
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 4,
        "described": 4,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "cd0c53e8a35a3cb36fc18e5248a2acf382b94b62d156b7bb9cc398eef3e21c4a",
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  "metadata": {
    "specs": {
      "Manufacturer": "Seiko Epson",
      "Package": "SMD2520-4P",
      "Category": "Crystals/Oscillators/Resonators",
      "Pins": "4"
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    "characteristics": {
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          "conditions": "+25 C; 10 variant of the printed pair",
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        {
          "name": "Frequency tolerance (variant ±30 ×10^-6)",
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        {
          "name": "Frequency-temperature characteristic (variant ±10 ×10^-6)",
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          "source_page": 1,
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        },
        {
          "name": "Frequency aging",
          "symbol": "f_age",
          "kind": "tolerance",
          "unit": "x10^-6/year",
          "min": null,
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          "conditions": "+25 C, first year",
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        {
          "name": "Series resistance ESR, 12.0 MHz ≤ f_nom < 16.0 MHz",
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          "unit": "Ω",
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          "name": "Series resistance ESR, 25.0 MHz < f_nom ≤ 30.0 MHz",
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          "unit": "Ω",
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          "source_page": 1,
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        {
          "name": "Series resistance ESR, 30.0 MHz < f_nom ≤ 35.0 MHz",
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          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
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          "source_page": 1,
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        {
          "name": "Series resistance ESR, 35.0 MHz < f_nom ≤ 54.0 MHz",
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          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "Band 35.0 MHz < f_nom ≤ 54.0 MHz; -20 C to +75 C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Excitation (drive) power, first printed value",
          "symbol": "DL",
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          "unit": "W",
          "min": null,
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          "conditions": "Not stated in datasheet text; first of two printed Max. values",
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        {
          "name": "Excitation (drive) power, second printed value",
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          "source_page": 1,
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        {
          "name": "Recommended excitation power",
          "symbol": "DL",
          "kind": "recommended_operating",
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          "min": 1,
          "typ": null,
          "max": 100,
          "conditions": "Recommended range",
          "source_page": 1,
          "source": "datasheet"
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        {
          "name": "Operating temperature range",
          "symbol": "T_use",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
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        {
          "name": "Storage temperature range (bare storage)",
          "symbol": "T_stg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "Bare storage (裸存)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Load capacitance",
          "symbol": "CL",
          "kind": "electrical",
          "unit": "pF",
          "min": 6,
          "typ": null,
          "max": null,
          "conditions": "Specifiable; load-capacitance code for this MPN not decoded in datasheet text",
          "source_page": 1,
          "source": "datasheet"
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        {
          "name": "Rated fundamental frequency range",
          "symbol": "f_nom",
          "kind": "electrical",
          "unit": "MHz",
          "min": 12,
          "typ": null,
          "max": 54,
          "conditions": "Fundamental mode; this MPN's frequency not decoded in datasheet text",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
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  "discovery_pitch": "Q24FA20H00428 (Seiko Epson) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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