JST SM04B-GHS-TB(LF)(SN) GH 4-circuit side entry SMT header

{
 "schema": "adom/verification@1",
 "part": "SM04B-GHS-TB(LF)(SN)",
 "variants": [],
 "entries": [
  {
   "date": "2026-10-21",
   "by": {
    "name": "Claude (AI agent)",
    "handle": ""
   },
   "status": "verified",
   "title": "Footprint matches JST's recommended PC board layout, pad by pad",
   "scope": [
    "footprint"
   ],
   "variants": [
    "*"
   ],
   "checks": [
    {
     "text": "Signal pads 0.6 x 1.7 mm on 1.25 mm pitch, centres x -1.875, -0.625, 0.625, 1.875 (JST p.1: 0.6, 1.25, 5.4 - 3.7)",
     "result": "pass"
    },
    {
     "text": "Solder tab pads 1.0 x 2.7 mm at x +-3.725 (JST p.1: 1.35 from the outer contact to the tab inner edge, tab 1.0 wide)",
     "result": "pass"
    },
    {
     "text": "Signal row to tab centre 3.2 mm in Y; signal pads 3.7 to 5.4 behind the tab front edge (JST p.1)",
     "result": "pass"
    },
    {
     "text": "Header outline 0.25 behind the tab front edge = F.Fab front edge y 2.45",
     "result": "pass"
    },
    {
     "text": "KiCad rounds the pad corners (roundrect ratio 0.25); JST draws plain rectangles. Extents match exactly.",
     "result": "note"
    }
   ],
   "evidence": [
    {
     "label": "comparison",
     "href": "provenance/footprint-vs-jst.json"
    },
    {
     "label": "JST layout (p.1)",
     "href": "docs/figures/sm04b-ghs-tb-lf-sn-ds-p1-side-entry-layout.png"
    }
   ],
   "files": {
    "sm04b-ghs-tb-lf-sn.kicad_mod": "8a5b9cf624c8776a11b69533ce0a854a9d2f90308db4821cd78e0713df3f96be",
    "provenance/footprint-vs-jst.json": "40c12d04c4b66a5892ad497d5a81c4fcb12451490581cc3eef520aa9796fc234"
   }
  },
  {
   "date": "2026-10-21",
   "by": {
    "name": "Claude (AI agent)",
    "handle": ""
   },
   "status": "verified",
   "title": "Pin 1: circuit 1 on footprint pad 1 and on the model's contact 1",
   "scope": [
    "pin1",
    "footprint",
    "3d"
   ],
   "variants": [
    "*"
   ],
   "checks": [
    {
     "text": "JST p.2 side entry view (mating face, board below): Circuit No.1 at the left",
     "result": "pass"
    },
    {
     "text": "Footprint: mating face toward +Y, so the viewer facing it has -X on the left; pad 1 is at x = -1.875 (-X end), F.Fab chevron and F.SilkS tick on the same end",
     "result": "pass"
    },
    {
     "text": "3D model: contact at x = -1.875 sits on pad 1 with zero offset; front render onto the mating face shows circuit 1 at the left, as JST draws it",
     "result": "pass"
    },
    {
     "text": "Symbol pins 1 to 4 = footprint pads 1 to 4; MP = both tab pads",
     "result": "pass"
    },
    {
     "text": "The real header and the model carry no pin-1 mark; the hero adds an AI pin-1 dot beside pad 1",
     "result": "note"
    }
   ],
   "evidence": [
    {
     "label": "JST header drawing (p.2)",
     "href": "docs/figures/sm04b-ghs-tb-lf-sn-ds-p2-shrouded-header.png"
    },
    {
     "label": "model front view",
     "href": "docs/models/sm04b-ghs-tb-lf-sn-glb-front.png"
    }
   ],
   "files": {
    "sm04b-ghs-tb-lf-sn.kicad_mod": "8a5b9cf624c8776a11b69533ce0a854a9d2f90308db4821cd78e0713df3f96be",
    "sm04b-ghs-tb-lf-sn.step": "aacba39c0ebf407941d81e202e5fc85121532adadfd38f26725330dea8815ac7",
    "sm04b-ghs-tb-lf-sn.kicad_sym": "f705bb40a8fd7fd7effcfb19e49c05ef0a519072ac9aa4b27761c23c6ee8c142"
   }
  },
  {
   "date": "2026-10-21",
   "by": {
    "name": "Claude (AI agent)",
    "handle": ""
   },
   "status": "verified",
   "title": "KiCad 3D model checked against JST's drawing",
   "scope": [
    "3d"
   ],
   "variants": [
    "*"
   ],
   "checks": [
    {
     "text": "B 8.25, A 3.75, pitch 1.25, contact 0.2, depth 4.05, height 4.25, tab inner face 1.75 from circuit 4: all match",
     "result": "pass"
    },
    {
     "text": "Contact tails stick out 0.895 mm behind the housing; JST draws 0.8. The tip stays 0.225 mm inside the signal pad.",
     "result": "fail"
    },
    {
     "text": "JST's own STEP could not be fetched (jst-mfg.com refused connections, jst.com 403); the model is KiCad community CAD",
     "result": "note"
    }
   ],
   "evidence": [
    {
     "label": "dimension table",
     "href": "provenance/3d-model.json"
    }
   ],
   "files": {
    "sm04b-ghs-tb-lf-sn.step": "aacba39c0ebf407941d81e202e5fc85121532adadfd38f26725330dea8815ac7"
   }
  },
  {
   "date": "2026-10-21",
   "by": {
    "name": "Claude (AI agent)",
    "handle": ""
   },
   "status": "open",
   "title": "Open: JST STEP comparison, native EDA imports, physical fit",
   "scope": [
    "3d",
    "eda"
   ],
   "variants": [
    "*"
   ],
   "checks": [
    {
     "text": "Compare with JST's STEP from jst-mfg.com once a browser session can fetch it",
     "result": "note"
    },
    {
     "text": "Native KiCad, Fusion and Altium imports not yet opened and inspected; files pass adom-lbr lint and the Altium round trip",
     "result": "note"
    },
    {
     "text": "No physical mating, crimp or reflow qualification",
     "result": "note"
    }
   ],
   "evidence": [],
   "files": {}
  }
 ]
}