component
BC858BW
Public Made by Adomby adom
XCH(旭昌辉) , SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391
{
"schema_version": 1,
"type": "component",
"slug": "bc858bw",
"title": "BC858BW",
"brief": "XCH(旭昌辉) , SOT-323. 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",
"ic",
"bc858bw",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "BC858BW",
"manufacturer": "XCH(旭昌辉)",
"package": "SOT-323",
"pin_count": 3,
"category": "IC",
"subcategory": "IC",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603202050042191872",
"parts": {
"symbol": "bc858bw.kicad_sym",
"footprint": "bc858bw.kicad_mod",
"model_3d": "bc858bw-hero.glb",
"model_3d_plain": "bc858bw-etched.glb",
"model_3d_step": "bc858bw-etched.step",
"model_3d_step_plain": "bc858bw.step",
"lbr": "bc858bw.lbr"
},
"distributor_links": {
"lcsc": "C19712037"
},
"distributor_check": {
"checked_at": "2026-10-17T14:20:09Z",
"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 PNP small-signal transistor; the device-level emitter-base breakdown voltage is -5 V minimum (VEBO, IE = -1 µA) and the BC858BW marking is 3K."
},
{
"number": "2",
"name": "Emitter",
"type": "passive",
"description": "Emitter terminal of the PNP small-signal transistor; the emitter-base voltage rating VEBO is -5 V and the continuous collector current rating is -0.1 A."
},
{
"number": "3",
"name": "Collector",
"type": "passive",
"description": "Collector terminal of the PNP small-signal transistor; for the BC858W the collector-base voltage VCBO is -30 V and the collector-emitter voltage VCEO is -30 V."
}
],
"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 SOT-323 pinout once for the whole family (BC856*W-BC857*W-BC858*W), not a se; The datasheet does not give per-pin electrical limits. The ratings in the pin descriptions are devic; The datasheet text does not give the BC858BW's pinout as a separate table or drawing; the SOT-323 pa"
],
"pages_sent": 4,
"cost_usd": 0.0158,
"at": "2026-10-17T14:17:37"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603202050042191872",
"pages": 4,
"sha256": "fa3dc7d0e201cc99",
"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": "bc858bw.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
2.1,
2,
1.1
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "acbf75a28fe41aa90efb38cd2b78220968d6eb6ebae1625dfd532dbeb268fece",
"checked": "2026-10-17",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "bc858bw-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
2.1,
2,
1.1
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "433de438f796639ec2001585961aee66e83358ddb0b6d2120cf6b4939d368dda",
"checked": "2026-10-17",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "XCH(旭昌辉)",
"Package": "SOT-323",
"Category": "",
"Pins": "3"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "fa3dc7d0e201cc99d57f03385b41a0ad6bdf878625042bd72b3a638ac2c19f46",
"rows": [
{
"name": "Collector-base breakdown voltage (BC858W)",
"symbol": "VCBO",
"kind": "electrical",
"unit": "V",
"min": -30,
"typ": null,
"max": null,
"conditions": "IC= -10μA, IE=0",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Collector-emitter breakdown voltage (BC858W)",
"symbol": "VCEO",
"kind": "electrical",
"unit": "V",
"min": -30,
"typ": null,
"max": null,
"conditions": "IC= -10mA, IB=0",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Emitter-base breakdown voltage",
"symbol": "VEBO",
"kind": "electrical",
"unit": "V",
"min": -5,
"typ": null,
"max": null,
"conditions": "IE= -1μA, IC=0",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Collector cut-off current",
"symbol": "ICBO",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": null,
"max": -15,
"conditions": "VCB= -30 V, IE=0",
"source_page": 2,
"source": "datasheet"
},
{
"name": "DC current gain (BC858BW)",
"symbol": "hFE",
"kind": "electrical",
"unit": "",
"min": 220,
"typ": null,
"max": 475,
"conditions": "VCE= -5V, IC= -2mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Collector-emitter saturation voltage",
"symbol": "VCE(sat)",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": -0.65,
"conditions": "IC=-100mA, IB= -5mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Base-emitter saturation voltage",
"symbol": "VBE(sat)",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": -1.1,
"conditions": "IC=-100mA, IB= -5mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Transition frequency",
"symbol": "fT",
"kind": "electrical",
"unit": "MHz",
"min": 100,
"typ": null,
"max": null,
"conditions": "VCE= -5V, IC= -10mA, f=100MHz",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Collector capacitance",
"symbol": "Cob",
"kind": "electrical",
"unit": "pF",
"min": null,
"typ": null,
"max": 4.5,
"conditions": "VCB=-10V, f=1MHz",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Collector-base voltage (BC858W)",
"symbol": "VCBO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": -30,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Collector-emitter voltage (BC858W)",
"symbol": "VCEO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": -30,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Emitter-base voltage",
"symbol": "VEBO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": -5,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Collector current, continuous",
"symbol": "IC",
"kind": "absolute_maximum",
"unit": "A",
"min": null,
"typ": null,
"max": -0.1,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Collector power dissipation",
"symbol": "PC",
"kind": "absolute_maximum",
"unit": "mW",
"min": null,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Junction temperature",
"symbol": "TJ",
"kind": "absolute_maximum",
"unit": "℃",
"min": null,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Storage temperature",
"symbol": "Tstg",
"kind": "absolute_maximum",
"unit": "℃",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"bc858bw"
],
"discovery_pitch": "BC858BW (XCH(旭昌辉)) 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",
"bc858bw.kicad_sym",
"bc858bw.kicad_mod",
"bc858bw.glb",
"bc858bw.step",
"bc858bw.lbr",
"docs/hero.png",
"docs/bc858bw-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"bc858bw-hero.glb",
"bc858bw-hero.overlay.json",
"bc858bw-etched.glb"
],
"visibility": {
"public": true
}
}