component
MMBZ18VA
Public Made by Adomby adom
JSMSEMI TVS, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359
{
"schema_version": 1,
"type": "component",
"slug": "mmbz18va",
"title": "MMBZ18VA",
"brief": "JSMSEMI TVS, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
"tags": [
"component",
"tvs-fuse-board level protection",
"mmbz18va",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "MMBZ18VA",
"manufacturer": "JSMSEMI",
"package": "SOT-23",
"pin_count": 3,
"category": "TVS/Fuse/Board Level Protection",
"subcategory": "TVS",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/54665b54ef0cbb09cffd004095d0e05a.pdf",
"parts": {
"symbol": "mmbz18va.kicad_sym",
"footprint": "mmbz18va.kicad_mod",
"model_3d": "mmbz18va-hero.glb",
"model_3d_step": "mmbz18va.step",
"lbr": "mmbz18va.lbr",
"model_3d_plain": "mmbz18va.glb"
},
"distributor_links": {
"lcsc": "C122859"
},
"distributor_check": {
"checked_at": "2026-11-04T18:48:18Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "K1",
"type": "passive",
"description": "Cathode of the first TVS diode, used unidirectionally against pin 3 with VRWM 14.5 V, VBR 17.10 to 18.90 V at 1.0 mA and VC 25 V at IPP 1.6 A."
},
{
"number": "2",
"name": "K2",
"type": "passive",
"description": "Cathode of the second TVS diode, used unidirectionally against pin 3 with VRWM 14.5 V, VBR 17.10 to 18.90 V at 1.0 mA and VC 25 V at IPP 1.6 A."
},
{
"number": "3",
"name": "A",
"type": "passive",
"description": "Common anode of both TVS diodes, shared by pins 1 and 2; the datasheet allows either two unidirectional channels (1-3, 2-3) or one bidirectional configuration (1-2)."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
"primary_mode": "text+vision",
"consensus_model": "claude-opus-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The datasheet gives no pin names and no pin types. K1, K2 and A are inferred from the 'Common Anode'",
"vision extraction: provenance cannot be text-verified; needs consensus"
],
"pages_sent": 5,
"cost_usd": 0.0947,
"at": "2026-11-04T18:48:13"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/54665b54ef0cbb09cffd004095d0e05a.pdf",
"pages": 5,
"sha256": "086b405f4e1e2f6a",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 3,
"described": 3,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "mmbz18va.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
2.5,
3,
1.2
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
"checked": "2026-11-04",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "JSMSEMI",
"Package": "SOT-23",
"Category": "TVS/Fuse/Board Level Protection",
"Pins": "3"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "086b405f4e1e2f6ad694d5f412981a0e91f9735edc599e84f1373296129aa576",
"rows": [
{
"name": "Peak Power Dissipation (1.0 ms, TA=25°C), MMBZ12VA thru MMBZ33VA group",
"symbol": "PPK",
"kind": "absolute_maximum",
"unit": "W",
"min": null,
"typ": null,
"max": 40,
"conditions": "@ 1.0 ms, TA=25°C",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Lead Solder Temperature (max, 10 s)",
"symbol": "TL",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 260,
"conditions": "10 s duration",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Junction and Storage Temperature Range",
"symbol": "TJ, TSTG",
"kind": "absolute_maximum",
"unit": "°C",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Total Power Dissipation on FR-5 Board",
"symbol": "PD",
"kind": "thermal",
"unit": "mW",
"min": null,
"typ": null,
"max": 225,
"conditions": "FR-5 board, TA=25°C",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Derate above 25°C, FR-5 Board",
"symbol": "",
"kind": "thermal",
"unit": "mW/°C",
"min": null,
"typ": 1.8,
"max": null,
"conditions": "above TA=25°C",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Thermal Resistance Junction-to-Ambient, FR-5 Board",
"symbol": "RθJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 556,
"max": null,
"conditions": "FR-5 board",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Total Power Dissipation on Alumina Substrate",
"symbol": "PD",
"kind": "thermal",
"unit": "mW",
"min": null,
"typ": null,
"max": 300,
"conditions": "Alumina substrate, TA=25°C",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Derate above 25°C, Alumina Substrate",
"symbol": "",
"kind": "thermal",
"unit": "mW/°C",
"min": null,
"typ": 2.4,
"max": null,
"conditions": "above TA=25°C",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Thermal Resistance Junction-to-Ambient, Alumina Substrate",
"symbol": "RθJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 417,
"max": null,
"conditions": "Alumina substrate",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Maximum Reverse Leakage Current",
"symbol": "IR",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": null,
"max": 50,
"conditions": "@ VRWM",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Working Peak Reverse Voltage",
"symbol": "VRWM",
"kind": "recommended_operating",
"unit": "V",
"min": null,
"typ": null,
"max": 14.5,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Breakdown Voltage (unidirectional)",
"symbol": "VBR",
"kind": "electrical",
"unit": "V",
"min": 17.1,
"typ": 18,
"max": 18.9,
"conditions": "IT = 1.0 mA, TA=25°C",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Maximum Temperature Coefficient of VBR",
"symbol": "θVBR",
"kind": "temperature_coefficient",
"unit": "mV/°C",
"min": null,
"typ": null,
"max": 15.3,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Forward Voltage",
"symbol": "VF",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.9,
"conditions": "IF = 10 mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Clamping Voltage",
"symbol": "VC",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 25,
"max": null,
"conditions": "@ IPP = 1.6 A",
"source_page": 2,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"mmbz18va"
],
"discovery_pitch": "MMBZ18VA (JSMSEMI) 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",
"mmbz18va.kicad_sym",
"mmbz18va.kicad_mod",
"mmbz18va.glb",
"mmbz18va.step",
"mmbz18va.lbr",
"docs/hero.png",
"docs/mmbz18va-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"mmbz18va-hero.glb",
"mmbz18va-hero.overlay.json"
],
"visibility": {
"public": true
}
}