← Commit history
README.mdadded+56
@@ -0,0 +1,56 @@+# ZM4737A++**Slkor(SLKORMICRO Elec.)** · Zener Diodes · LL-41++ZM4737A from Slkor(SLKORMICRO Elec.), in a LL-41. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |+| 2 | A | passive | Anode. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Slkor(SLKORMICRO Elec.) |+| Package | LL-41 |+| Category | Diodes |+| Pins | 2 |++## Electrical characteristics++Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).++| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |+|---|---|---|---|---|---|---|---|+| Power Dissipation | Ptot |  |  | 1 | W | Valid provided electrodes are kept at ambient temperature | 1 |+| Junction Temperature | Tj |  |  | 175 | ℃ |  | 1 |+| Storage Temperature Range | Tstg | -65 |  | 175 | ℃ |  | 1 |+| Thermal Resistance Junction to Ambient Air | RθJA |  |  | 170 | K/W | Valid provided electrodes are kept at ambient temperature | 1 |+| Zener Voltage Tolerance (suffix A, ±5%) | VZnom | -5 |  | 5 | % | Suffix A denotes ±5% Zener voltage tolerance | 1 |+| Dynamic Resistance | ZZT |  |  | 4 | Ω | At IZT = 34 mA; 60 Hz AC at 10% of IZT RMS | 2 |+| Dynamic Resistance (knee) | ZZK |  |  | 700 | Ω | At IZK = 0.5 mA | 2 |+| Reverse Current | IR |  |  | 10 | µA | At VR = 5 V | 2 |+| Maximum Surge Current | IZSM |  |  | 605 | mA | Peak non-repetitive reverse surge, 1/2 square wave or sine pulse of 1/120 s superimposed on IZT | 2 |+| Maximum Regulator Current | IZM |  |  | 121 | mA | Valid provided electrodes are kept at ambient temperature | 2 |+| Forward Voltage | VF |  |  | 1.2 | V | At IF = 200 mA | 1 |+| Nominal Zener Voltage | VZnom |  | 7.5 |  | V | At IZT = 34 mA | 2 |++## CAD (KiCad official)++- Symbol: `ZM4737A`+- Footprint: `Diode_SMD:D_MELF`+- 3D model: LL-41 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Slkor(SLKORMICRO Elec.) datasheet](docs/zm4737a-datasheet.pdf) (3 pp, sha256 `ea3e3b30191fadbe`, retrieved 2026-10-21, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/zm4737a-datasheet.pdf)
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package.jsonadded+139
@@ -0,0 +1,139 @@+{+  "slug": "zm4737a",+  "version": "0.1.0",+  "type": "component",+  "description": "Slkor(SLKORMICRO Elec.) Zener Diodes, LL-41. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.",+  "tags": [+    "component",+    "diodes",+    "zm4737a",+    "factory-2.0.0",+    "extractor-text"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "zm4737a.kicad_sym",+    "zm4737a.kicad_mod",+    "zm4737a.glb",+    "zm4737a.step",+    "zm4737a.lbr",+    "docs/hero.png",+    "docs/zm4737a-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html",+    "zm4737a-hero.glb",+    "zm4737a-hero.overlay.json"+  ],+  "component": {+    "mpn": "ZM4737A",+    "manufacturer": "Slkor(SLKORMICRO Elec.)",+    "package": "LL-41",+    "pin_count": 2,+    "category": "Diodes",+    "subcategory": "Zener Diodes",+    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/ea28457e9554493550774c2b59979cb8.pdf",+    "parts": {+      "symbol": "zm4737a.kicad_sym",+      "footprint": "zm4737a.kicad_mod",+      "model_3d": "zm4737a-hero.glb",+      "model_3d_step": "zm4737a.step",+      "lbr": "zm4737a.lbr",+      "model_3d_plain": "zm4737a.glb"+    },+    "distributor_links": {+      "lcsc": "C6077531",+      "digikey": "5399-ZM4737ATR-ND",+      "mouser": "821-ZM4737A"+    },+    "distributor_check": {+      "checked_at": "2026-10-21T04:56:54Z",+      "source": "Component Ocean /api/assign-pns",+      "digikey": {+        "pn": "5399-ZM4737ATR-ND",+        "status": "found",+        "lifecycle": "Active"+      },+      "mouser": {+        "pn": "821-ZM4737A",+        "status": "found",+        "lifecycle": "Part Number Change"+      }+    },+    "pins": [+      {+        "number": "1",+        "name": "K",+        "type": "passive",+        "description": "Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint."+      },+      {+        "number": "2",+        "name": "A",+        "type": "passive",+        "description": "Anode."+      }+    ],+    "provenance": {+      "extractor": "extract_pins",+      "factory_chain": {+        "factory": "2.0.0",+        "extractor": "extract_pins",+        "primary_model": "cathode-band convention",+        "primary_mode": "convention",+        "consensus_model": null,+        "consensus": "agreed",+        "guards": "pin_guards 0.1: passed",+        "guard_notes": [+          "vision extraction: provenance cannot be text-verified; needs consensus"+        ],+        "pages_sent": 3,+        "cost_usd": 0.0009,+        "at": "2026-10-21T04:53:16"+      },+      "datasheet": {+        "url": "https://datasheet.lcsc.com/datasheet/pdf/ea28457e9554493550774c2b59979cb8.pdf",+        "pages": 3,+        "sha256": "ea3e3b30191fadbe",+        "source_tier": "lcsc"+      },+      "cad": "KiCad official (CC-BY-SA 4.0)",+      "pins": {+        "total": 2,+        "described": 2,+        "cites_pages": true,+        "refuses_to_fabricate": true+      }+    },+    "viewers": {+      "symbol": "viewers/symbol.html",+      "footprint": "viewers/footprint.html"+    },+    "models_3d": [+      {+        "file": "zm4737a.step",+        "role": "plain",+        "up": "Z",+        "units": "mm",+        "origin": "footprint origin = pad-pattern centre",+        "seat": "z = 0",+        "extents_mm": [+          5.8,+          2.2,+          2.2+        ],+        "zmin_mm": 0.0,+        "centre_offset_mm": 0.0,+        "footprint_binding": "identity",+        "sha256": "3b1fa81e2e3ea0ef2e0ddbeb3f62b354a14174610250e6069a5076959a63f835",+        "checked": "2026-10-21",+        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+      }+    ]+  }+}
page.jsonadded+145
@@ -0,0 +1,145 @@+{+  "slug": "zm4737a",+  "version": "0.1.0",+  "type": "component",+  "description": "Slkor(SLKORMICRO Elec.) Zener Diodes, LL-41. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.",+  "tags": [+    "component",+    "diodes",+    "zm4737a",+    "factory-2.0.0",+    "extractor-text"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "zm4737a.kicad_sym",+    "zm4737a.kicad_mod",+    "zm4737a.glb",+    "zm4737a.step",+    "zm4737a.lbr",+    "docs/hero.png",+    "docs/zm4737a-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html",+    "zm4737a-hero.glb",+    "zm4737a-hero.overlay.json"+  ],+  "component": {+    "mpn": "ZM4737A",+    "manufacturer": "Slkor(SLKORMICRO Elec.)",+    "package": "LL-41",+    "pin_count": 2,+    "category": "Diodes",+    "subcategory": "Zener Diodes",+    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/ea28457e9554493550774c2b59979cb8.pdf",+    "parts": {+      "symbol": "zm4737a.kicad_sym",+      "footprint": "zm4737a.kicad_mod",+      "model_3d": "zm4737a-hero.glb",+      "model_3d_step": "zm4737a.step",+      "lbr": "zm4737a.lbr",+      "model_3d_plain": "zm4737a.glb"+    },+    "distributor_links": {+      "lcsc": "C6077531",+      "digikey": "5399-ZM4737ATR-ND",+      "mouser": "821-ZM4737A"+    },+    "distributor_check": {+      "checked_at": "2026-10-21T04:56:54Z",+      "source": "Component Ocean /api/assign-pns",+      "digikey": {+        "pn": "5399-ZM4737ATR-ND",+        "status": "found",+        "lifecycle": "Active"+      },+      "mouser": {+        "pn": "821-ZM4737A",+        "status": "found",+        "lifecycle": "Part Number Change"+      }+    },+    "pins": [+      {+        "number": "1",+        "name": "K",+        "type": "passive",+        "description": "Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint."+      },+      {+        "number": "2",+        "name": "A",+        "type": "passive",+        "description": "Anode."+      }+    ],+    "provenance": {+      "extractor": "extract_pins",+      "factory_chain": {+        "factory": "2.0.0",+        "extractor": "extract_pins",+        "primary_model": "cathode-band convention",+        "primary_mode": "convention",+        "consensus_model": null,+        "consensus": "agreed",+        "guards": "pin_guards 0.1: passed",+        "guard_notes": [+          "vision extraction: provenance cannot be text-verified; needs consensus"+        ],+        "pages_sent": 3,+        "cost_usd": 0.0009,+        "at": "2026-10-21T04:53:16"+      },+      "datasheet": {+        "url": "https://datasheet.lcsc.com/datasheet/pdf/ea28457e9554493550774c2b59979cb8.pdf",+        "pages": 3,+        "sha256": "ea3e3b30191fadbe",+        "source_tier": "lcsc"+      },+      "cad": "KiCad official (CC-BY-SA 4.0)",+      "pins": {+        "total": 2,+        "described": 2,+        "cites_pages": true,+        "refuses_to_fabricate": true+      }+    },+    "viewers": {+      "symbol": "viewers/symbol.html",+      "footprint": "viewers/footprint.html"+    },+    "models_3d": [+      {+        "file": "zm4737a.step",+        "role": "plain",+        "up": "Z",+        "units": "mm",+        "origin": "footprint origin = pad-pattern centre",+        "seat": "z = 0",+        "extents_mm": [+          5.8,+          2.2,+          2.2+        ],+        "zmin_mm": 0,+        "centre_offset_mm": 0,+        "footprint_binding": "identity",+        "sha256": "3b1fa81e2e3ea0ef2e0ddbeb3f62b354a14174610250e6069a5076959a63f835",+        "checked": "2026-10-21",+        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+      }+    ]+  },+  "visibility": "public",+  "org": "adom",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file
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zm4737a-hero.overlay.jsonadded+133
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zm4737a.glbadded
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zm4737a.kicad_modadded+265
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zm4737a.kicad_symadded+21
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zm4737a.lbradded+107
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Diode, MELF</description>+  <smd name="1" x="-2.4000" y="-0.0000" dx="1.5000" dy="2.7000" layer="1" roundness="33"/>+  <smd name="2" x="2.4000" y="-0.0000" dx="1.5000" dy="2.7000" layer="1" roundness="33"/>+  <wire x1="-3.4100" y1="1.6100" x2="-3.4100" y2="-1.6100" width="0.1200" layer="21"/>+  <wire x1="-3.4100" y1="-1.6100" x2="2.4000" y2="-1.6100" width="0.1200" layer="21"/>+  <wire x1="2.4000" y1="1.6100" x2="-3.4100" y2="1.6100" width="0.1200" layer="21"/>+  <wire x1="-2.6000" y1="1.3000" x2="-2.6000" y2="-1.3000" width="0.1000" layer="51"/>+  <wire x1="-2.6000" y1="-1.3000" x2="2.6000" y2="-1.3000" width="0.1000" layer="51"/>+  <wire x1="-0.6494" y1="0.7991" x2="-0.6494" y2="-0.8011" width="0.1000" layer="51"/>+  <wire x1="-0.6494" y1="-0.0010" x2="-1.5511" y2="-0.0010" width="0.1000" layer="51"/>+  <wire x1="-0.6494" y1="-0.0010" x2="0.5012" y2="0.7991" width="0.1000" layer="51"/>+  <wire x1="-0.6494" y1="-0.0010" x2="0.5012" y2="-0.7503" width="0.1000" layer="51"/>+  <wire x1="0.5012" y1="-0.0010" x2="1.4994" y2="-0.0010" width="0.1000" layer="51"/>+  <wire x1="0.5012" y1="-0.7503" x2="0.5012" y2="0.7991" width="0.1000" layer="51"/>+  <wire x1="2.6000" y1="1.3000" x2="-2.6000" y2="1.3000" width="0.1000" layer="51"/>+  <wire x1="2.6000" y1="-1.3000" x2="2.6000" y2="1.3000" width="0.1000" layer="51"/>+  <text x="0" y="2.210" size="1.27" layer="25" align="bottom-center">&gt;NAME</text>+  <text x="0" y="-2.210" size="1.27" layer="27" align="top-center">&gt;VALUE</text>+</package>+</packages>+<symbols>+<symbol name="ZM4737A">+  <wire x1="-12.7" y1="2.54" x2="12.7" y2="2.54" width="0.254" layer="94"/>+  <wire x1="12.7" y1="2.54" x2="12.7" y2="-2.54" width="0.254" layer="94"/>+  <wire x1="12.7" y1="-2.54" x2="-12.7" y2="-2.54" width="0.254" layer="94"/>+  <wire x1="-12.7" y1="-2.54" x2="-12.7" y2="2.54" width="0.254" layer="94"/>+  <text x="0.0000" y="5.0800" size="1.27" layer="95" align="center">&gt;NAME</text>+  <text x="0.0000" y="-5.0800" size="1.27" layer="96" align="center">&gt;VALUE</text>+  <pin name="K" x="-17.78" y="0" length="middle" direction="pas"/>+  <pin name="A" x="17.78" y="0" length="middle" direction="pas" rot="R180"/>+</symbol>+</symbols>+<devicesets>+<deviceset name="ZM4737A" prefix="U">+  <description></description>+  <gates>+    <gate name="G$1" symbol="ZM4737A" x="0" y="0"/>+  </gates>+  <devices>+    <device name="" package="D_MELF">+      <connects>+        <connect gate="G$1" pin="K" pad="1"/>+        <connect gate="G$1" pin="A" pad="2"/>+      </connects>+      <technologies><technology name=""/></technologies>+    </device>+  </devices>+</deviceset>+</devicesets>+</library>+</drawing>+</eagle>\ No newline at end of file
zm4737a.stepadded+429
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+HEADER;
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