0402WGF1781TCE

{
 "schema": "adom/verification@1",
 "part": "0402WGF1781TCE",
 "variants": [],
 "entries": [
  {
   "date": "2026-10-16",
   "by": {
    "name": "Claude (AI build)",
    "handle": "claude"
   },
   "status": "superseded",
   "title": "Automated build checks (awaiting human validation)",
   "scope": [
    "symbol",
    "footprint",
    "3d",
    "pins"
   ],
   "variants": [
    "*"
   ],
   "checks": [
    {
     "text": "Footprint extracted pad-for-pad from the source board and normalized to the footprint frame (back-side parts un-mirrored)",
     "result": "pass"
    },
    {
     "text": "3D model seated z=0 at footprint origin (placement inverse; method centroid-matched to KiCad library models on 59 cases)",
     "result": "pass"
    },
    {
     "text": "adom-lbr generate + lint passed",
     "result": "pass"
    },
    {
     "text": "2 of 2 pins described",
     "result": "pass"
    },
    {
     "text": "Not yet checked by a person: land pattern vs datasheet, pin-1/orientation, 3D body vs drawing",
     "result": "note"
    }
   ],
   "evidence": [
    {
     "label": "datasheet",
     "href": "docs/0402wgf1781tce-datasheet.pdf"
    }
   ],
   "files": {
    "0402wgf1781tce.kicad_sym": "aa6be13c451994b99126157cc3fc792310eb562557a5f43f8ce4dbd0deb839e4",
    "0402wgf1781tce.kicad_mod": "0144eaa41d03fd00176578090fd0789c8c9d8c9d700170c1afcbe6ebecfca189",
    "0402wgf1781tce.step": "91507e5af4251cb4ef38e04889c9b98da29904432bd83786bba13ae9b605eacb"
   }
  },
  {
   "date": "2026-10-27",
   "by": {
    "name": "Claude, at Caleb Taylor's request",
    "handle": "claude"
   },
   "status": "verified",
   "title": "Validated against Uniroyal's Thick Film Chip Resistors datasheet (V.11, Mar. 17, 2026, File No. SMD-SP-001)",
   "scope": [
    "symbol",
    "footprint",
    "3d",
    "pins"
   ],
   "variants": [
    "*"
   ],
   "checks": [
    {
     "text": "Datasheet: replaced the LCSC copy (Uniroyal V.3, Feb. 12, 2019) with Uniroyal Electronics' current Thick Film Chip Resistors datasheet, V.11, Mar. 17, 2026, File No. SMD-SP-001, downloaded 2026-10-27 from the 'General / Thick Film Chip Resistors' row of uni-royal.cn/en product.php?s=Thick+Film+Chip+Resistors (https://www.uni-royal.cn/en/images/userfile/file/1787191973c56505e6d9ab55c7.pdf). The header carries the ROYALOHM and uniohm logos and p.1 lists Royal Electronic Factory (Thailand) as a plant, which ties Mouser's 'Royalohm' listing to this maker",
     "result": "pass"
    },
    {
     "text": "Part number decoded with the Part No. System and Ordering Procedure (p.2): 0402 size; WG = 1/16 W; F = ±1%; 1781 = ≤1% E-96 style code, three significant digits and a multiplier = 178 x 10^1 Ω = 1.78 kΩ; T = tape/reel; C = 10,000 pcs for 0402; E = standard. Matches the LCSC summary on the page (1.78 kΩ, ±1%, 0402)",
     "result": "pass"
    },
    {
     "text": "Ratings for 0402 (p.5-7): 1/16 W at 70 °C (derates to zero at 155 °C, p.6), max. working voltage 50 V, max. overload voltage 100 V, operating temperature -55 to +155 °C, TCR ±100 ppm/°C for R > 10 Ω (p.7); resistance range at ±1% covers 1.78 kΩ (p.5)",
     "result": "pass"
    },
    {
     "text": "Pins: unpolarized two-terminal part; pins 1 and 2 keep empty names, type passive and the library descriptions (the datasheet has no pin table; both terminations are identical, p.4)",
     "result": "pass"
    },
    {
     "text": "Footprint vs the 0402 body (p.4: L 1.00±0.10, W 0.50±0.05, bottom termination B 0.25±0.10 mm): pads 0.54 x 0.64 mm at x = ±0.51 mm cover both terminations (pad inner edges at ±0.24, outer at ±0.78 mm; pad width 0.64 mm is at least the maximum body width); pins 1/2 on the long axis",
     "result": "pass"
    },
    {
     "text": "Footprint vs Uniroyal's recommended soldering pads (11.3, p.9; 0402: gap A 0.5, pad length B 0.45, pad width C 0.5, overall D 1.4 mm, each ±0.05): the KiCad pads give gap 0.48, length 0.54, width 0.64, overall 1.56 mm. The KiCad pads are longer and wider than the maker's recommendation and still cover the terminations; kept as built on Adom boards",
     "result": "note"
    },
    {
     "text": "3D body 1.00 x 0.50 x 0.35 mm against L 1.00±0.10, W 0.50±0.05, H 0.35±0.05 mm (p.4): within tolerance; Z-up, seated on z = 0, centred on the pads",
     "result": "pass"
    },
    {
     "text": "Distributors: Mouser 303-0402WGF1781TCE (Royalohm, 'RMC 0402 1/16W 1%', reel of 10,000) confirmed by MPN search on 2026-10-27; DigiKey does not carry it (searched 0402WGF1781TCE and 0402WGF, 0 results)",
     "result": "pass"
    },
    {
     "text": "Symbol and footprint Datasheet properties point at the manufacturer datasheet URL",
     "result": "pass"
    },
    {
     "text": "Symbol Datasheet / MPN / Manufacturer / DigiKey / Mouser / LCSC properties agree with page.json; footprint Datasheet property points at the manufacturer datasheet URL",
     "result": "pass"
    },
    {
     "text": "component-page-verify: all checks pass",
     "result": "pass"
    }
   ],
   "evidence": [
    {
     "label": "datasheet (Uniroyal Electronics)",
     "href": "https://www.uni-royal.cn/en/images/userfile/file/1787191973c56505e6d9ab55c7.pdf"
    }
   ],
   "files": {
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    "0402wgf1781tce.kicad_mod": "e0fa57696a2f426f1b854d0415898a74f12a1d471a317f5facfd9fd340760dfd",
    "0402wgf1781tce.step": "91507e5af4251cb4ef38e04889c9b98da29904432bd83786bba13ae9b605eacb"
   }
  }
 ]
}