component
MM1W91
Public Made by Adomby adom
MDD（Microdiode Electronics） Zener Diodes, SOD-123. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326
{
"schema_version": 1,
"type": "component",
"slug": "mm1w91",
"title": "MM1W91",
"brief": "MDD（Microdiode Electronics） Zener Diodes, SOD-123. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
"tags": [
"component",
"diodes",
"mm1w91",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "MM1W91",
"manufacturer": "MDD（Microdiode Electronics）",
"package": "SOD-123",
"pin_count": 2,
"category": "Diodes",
"subcategory": "Zener Diodes",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/66e66b40489cc7b6d2a239c72291d45e.pdf",
"parts": {
"symbol": "mm1w91.kicad_sym",
"footprint": "mm1w91.kicad_mod",
"model_3d": "mm1w91-hero.glb",
"model_3d_plain": "mm1w91-etched.glb",
"model_3d_step": "mm1w91-etched.step",
"model_3d_step_plain": "mm1w91.step",
"lbr": "mm1w91.lbr"
},
"distributor_links": {
"lcsc": "C364305"
},
"distributor_check": {
"checked_at": "2026-10-22T23:13:15Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "deferred",
"error": "shared DigiKey quota guard: 605 calls left today"
},
"mouser": {
"pn": null,
"status": "quota"
}
},
"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": 0.0221,
"at": "2026-10-22T23:13:05"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/66e66b40489cc7b6d2a239c72291d45e.pdf",
"pages": 3,
"sha256": "c57231a6b7e96264",
"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": "mm1w91.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
3.5,
1.6,
1.1
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "132323445e3d1f9231e81c083cd88a33cd204dd8b96063bb2ed1f3ab4470c7e7",
"checked": "2026-10-22",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "mm1w91-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
3.5,
1.6,
1.1
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "cc212fa607d7adaa59366ee7fa4a481bc997acb92072a999369b5764e3e959f5",
"checked": "2026-10-22",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "MDD（Microdiode Electronics）",
"Package": "SOD-123",
"Category": "Diodes",
"Pins": "2"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "c57231a6b7e96264bbbb86c46dd81b32c2078ac481fd7b44b5b4922a293160cd",
"rows": [
{
"name": "Zener Voltage",
"symbol": "VZT",
"kind": "electrical",
"unit": "V",
"min": 86,
"typ": 91,
"max": 96,
"conditions": "at IZT=2.8mA, pulse 20 ms",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Test Current",
"symbol": "IZT",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 2.8,
"max": null,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Dynamic Impedance",
"symbol": "ZZT",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": null,
"max": 250,
"conditions": "at IZT",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Reverse Current",
"symbol": "IR",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 1,
"conditions": "at VR=69V",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Admissible Zener Current",
"symbol": "IZM",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": null,
"max": 10,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Forward Voltage",
"symbol": "VF",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 1.2,
"conditions": "IF=10mA",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Power Dissipation",
"symbol": "Pd",
"kind": "absolute_maximum",
"unit": "W",
"min": null,
"typ": null,
"max": 1,
"conditions": "Ta=25℃",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Thermal Resistance Junction to Ambient",
"symbol": "RθJA",
"kind": "thermal",
"unit": "℃/W",
"min": null,
"typ": 300,
"max": null,
"conditions": "P.C.B. mounted with 2.0\" X 2.0\" (5 X 5 cm) copper area pads",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Junction Temperature",
"symbol": "Tj",
"kind": "absolute_maximum",
"unit": "℃",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Storage Temperature Range",
"symbol": "Tstg",
"kind": "absolute_maximum",
"unit": "℃",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Zener Voltage Tolerance",
"symbol": "",
"kind": "tolerance",
"unit": "%",
"min": -5,
"typ": null,
"max": 5,
"conditions": "approximately",
"source_page": 1,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"mm1w91"
],
"discovery_pitch": "MM1W91 (MDD（Microdiode Electronics）) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"mm1w91.kicad_sym",
"mm1w91.kicad_mod",
"mm1w91.glb",
"mm1w91.step",
"mm1w91.lbr",
"docs/hero.png",
"docs/mm1w91-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"mm1w91-hero.glb",
"mm1w91-hero.overlay.json",
"mm1w91-etched.glb"
],
"visibility": {
"public": true
}
}