component
BCW72
Public Made by Adomby adom
Nexperia Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427
{
"schema_version": 1,
"type": "component",
"slug": "bcw72",
"title": "BCW72",
"brief": "Nexperia Bipolar (BJT), 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",
"transistors-thyristors",
"bcw72",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "BCW72",
"manufacturer": "Nexperia",
"package": "SOT-23",
"pin_count": 3,
"category": "Transistors/Thyristors",
"subcategory": "Bipolar (BJT)",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588935060694818816",
"parts": {
"symbol": "bcw72.kicad_sym",
"footprint": "bcw72.kicad_mod",
"model_3d": "bcw72-hero.glb",
"model_3d_plain": "bcw72-etched.glb",
"model_3d_step": "bcw72-etched.step",
"model_3d_step_plain": "bcw72.step",
"lbr": "bcw72.lbr"
},
"distributor_links": {
"lcsc": "C461206"
},
"distributor_check": {
"checked_at": "2026-10-18T16:51:45Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "quota"
},
"mouser": {
"pn": null,
"status": "quota"
}
},
"pins": [
{
"number": "1",
"name": "base",
"type": "input",
"description": "Base terminal of the BCW72 NPN transistor; the datasheet limits the peak base current IBM to 200 mA and the emitter-base voltage VEBO to 5 V (open collector)."
},
{
"number": "2",
"name": "emitter",
"type": "passive",
"description": "Emitter terminal of the BCW72 NPN transistor; the emitter-base voltage is limited to VEBO = 5 V maximum with the collector open."
},
{
"number": "3",
"name": "collector",
"type": "passive",
"description": "Collector terminal of the BCW72 NPN transistor; the datasheet limits DC collector current IC to 100 mA and collector-emitter voltage VCEO to 45 V (open base, IC = 2 mA)."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-haiku-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The datasheet gives the pin names (base, emitter, collector) and the top-view SOT23 figure, but no p; The per-pin descriptions cite device-level limiting values from the Limiting values table (VEBO, IBM; The datasheet covers two types, BCW71 (marking K1*) and BCW72 (marking K2*), in the same SOT23 packa"
],
"pages_sent": 7,
"cost_usd": 0.0236,
"at": "2026-10-18T16:51:31"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588935060694818816",
"pages": 7,
"sha256": "17970b7d1101737a",
"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": "bcw72.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": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "bcw72-etched.step",
"role": "eda",
"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": "d0c20fb26b298f7cdc9a1e29abb439394d4fabcaabed54c8d0734036ac53db0f",
"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Nexperia",
"Package": "SOT-23",
"Category": "Transistors/Thyristors",
"Pins": "3"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "17970b7d1101737a12bf60e7705ebb0a41cc943facbe409e8502b1458324faf3",
"rows": [
{
"name": "collector-base voltage (open emitter)",
"symbol": "VCBO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 50,
"conditions": "open emitter",
"source_page": 3,
"source": "datasheet"
},
{
"name": "collector-emitter voltage (open base)",
"symbol": "VCEO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 45,
"conditions": "open base; IC = 2 mA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "emitter-base voltage (open collector)",
"symbol": "VEBO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 5,
"conditions": "open collector",
"source_page": 3,
"source": "datasheet"
},
{
"name": "collector current (DC)",
"symbol": "IC",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 100,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "peak collector current",
"symbol": "ICM",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 200,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "peak base current",
"symbol": "IBM",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 200,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "total power dissipation",
"symbol": "Ptot",
"kind": "absolute_maximum",
"unit": "mW",
"min": null,
"typ": null,
"max": 250,
"conditions": "Tamb ≤ 25 °C",
"source_page": 3,
"source": "datasheet"
},
{
"name": "storage temperature",
"symbol": "Tstg",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "junction temperature",
"symbol": "Tj",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "operating ambient temperature",
"symbol": "Tamb",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "thermal resistance from junction to ambient",
"symbol": "Rth j-a",
"kind": "thermal",
"unit": "K/W",
"min": null,
"typ": 500,
"max": null,
"conditions": "note 1: transistor mounted on an FR4 printed-circuit board",
"source_page": 4,
"source": "datasheet"
},
{
"name": "collector cut-off current",
"symbol": "ICBO",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": null,
"max": 100,
"conditions": "IE = 0; VCB = 20 V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "collector cut-off current",
"symbol": "ICBO",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": null,
"max": 10,
"conditions": "IE = 0; VCB = 20 V; Tj = 100 °C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "emitter cut-off current",
"symbol": "IEBO",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": null,
"max": 100,
"conditions": "IC = 0; VEB = 5 V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "DC current gain (BCW72)",
"symbol": "hFE",
"kind": "electrical",
"unit": "",
"min": 200,
"typ": null,
"max": 450,
"conditions": "IC = 2 mA; VCE = 5 V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "collector-emitter saturation voltage",
"symbol": "VCEsat",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 120,
"max": 250,
"conditions": "IC = 10 mA; IB = 0.5 mA",
"source_page": 4,
"source": "datasheet"
},
{
"name": "base-emitter voltage",
"symbol": "VBE",
"kind": "electrical",
"unit": "mV",
"min": 550,
"typ": null,
"max": 700,
"conditions": "IC = 2 mA; VCE = 5 V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "transition frequency",
"symbol": "fT",
"kind": "electrical",
"unit": "MHz",
"min": 100,
"typ": null,
"max": null,
"conditions": "IC = 10 mA; VCE = 5 V; f = 100 MHz",
"source_page": 4,
"source": "datasheet"
},
{
"name": "noise figure",
"symbol": "F",
"kind": "electrical",
"unit": "dB",
"min": null,
"typ": null,
"max": 10,
"conditions": "IC = 200 μA; VCE = 5 V; RS = 2 kΩ; f = 1 kHz; B = 200 Hz",
"source_page": 4,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"bcw72"
],
"discovery_pitch": "BCW72 (Nexperia) 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",
"bcw72.kicad_sym",
"bcw72.kicad_mod",
"bcw72.glb",
"bcw72.step",
"bcw72.lbr",
"docs/hero.png",
"docs/bcw72-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"bcw72-hero.glb",
"bcw72-hero.overlay.json",
"bcw72-etched.glb"
],
"visibility": {
"public": true
}
}