component
BC548A
Public Made by Adomby adom
DIOTEC Bipolar (BJT), TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537
{
"schema_version": 1,
"type": "component",
"slug": "bc548a",
"title": "BC548A",
"brief": "DIOTEC Bipolar (BJT), TO-92. 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",
"bc548a",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "BC548A",
"manufacturer": "DIOTEC",
"package": "TO-92",
"pin_count": 3,
"category": "Transistors/Thyristors",
"subcategory": "Bipolar (BJT)",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8600675947771006976",
"parts": {
"symbol": "bc548a.kicad_sym",
"footprint": "bc548a.kicad_mod",
"model_3d": "bc548a-hero.glb",
"model_3d_plain": "bc548a-etched.glb",
"model_3d_step": "bc548a-etched.step",
"model_3d_step_plain": "bc548a.step",
"lbr": "bc548a.lbr"
},
"distributor_links": {
"lcsc": "C3201559",
"digikey": "4878-BC548ACT-ND",
"mouser": "637-BC548A"
},
"distributor_check": {
"checked_at": "2026-10-19T05:32:10Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "4878-BC548ACT-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "637-BC548A",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "C",
"type": "passive",
"description": "Collector; VCEO max 30 V and DC collector current IC max 100 mA (200 mA peak) for BC548."
},
{
"number": "2",
"name": "B",
"type": "input",
"description": "Base; emitter-base voltage VEBO max 5 V and peak base current IBM max 200 mA."
},
{
"number": "3",
"name": "E",
"type": "passive",
"description": "Emitter; peak emitter current IEM max 200 mA."
}
],
"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: Pin assignment (C=1, B=2, E=3) is read from the schematic symbol on page 1; pin numbers 1/2/3 are al",
"vision extraction: provenance cannot be text-verified; needs consensus"
],
"pages_sent": 4,
"cost_usd": 0.2662,
"at": "2026-10-19T05:30:00"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8600675947771006976",
"pages": 4,
"sha256": "10a6b5162050d1ce",
"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": "bc548a.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "body on z = 0, through-hole leads below",
"extents_mm": [
4.83,
3.745,
9.8
],
"zmin_mm": -2.5,
"centre_offset_mm": 0.542,
"footprint_binding": "identity",
"sha256": "f0b61c32ecbf0067157adc5a3d4966ceadf5d6dafe93c51af35f76c41c71a54a",
"checked": "2026-10-19",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "bc548a-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "body on z = 0, through-hole leads below",
"extents_mm": [
4.83,
3.745,
9.8
],
"zmin_mm": -2.5,
"centre_offset_mm": 0.542,
"footprint_binding": "identity",
"sha256": "ceac096908e4770ba3ef7d071bdbd76ce98d77b77f3eabc5a31e7ed1f4768585",
"checked": "2026-10-19",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "DIOTEC",
"Package": "TO-92",
"Category": "Transistors/Thyristors",
"Pins": "3"
},
"appearance": {
"contacts": {
"quote": "affect human life or health, user shall contact in advance Diotec Semiconductor AG's Managing Board (Heitersheim, Germany) to",
"page": 4,
"doc": "ds.pdf",
"plating": "silver"
},
"version": 1,
"datasheet_sha256": "10a6b5162050d1cee04a7f8e50c20d48923e29f297403c89cce99877b579a148"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "10a6b5162050d1cee04a7f8e50c20d48923e29f297403c89cce99877b579a148",
"rows": [
{
"name": "Collector-Emitter voltage (E-B short)",
"symbol": "VCES",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 30,
"conditions": "E-B short",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Collector-Emitter voltage (B open)",
"symbol": "VCEO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 30,
"conditions": "B open",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Collector-Base voltage",
"symbol": "VCBO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 30,
"conditions": "E open",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Emitter-Base voltage",
"symbol": "VEBO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 5,
"conditions": "C open",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Power dissipation",
"symbol": "Ptot",
"kind": "absolute_maximum",
"unit": "mW",
"min": null,
"typ": null,
"max": 500,
"conditions": "Valid if leads kept at TA at 2 mm distance from case",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Collector current DC",
"symbol": "IC",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 100,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Peak collector current",
"symbol": "ICM",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 200,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Peak base current",
"symbol": "IBM",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 200,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Peak emitter current",
"symbol": "IEM",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 200,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Junction temperature",
"symbol": "Tj",
"kind": "absolute_maximum",
"unit": "°C",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Storage temperature",
"symbol": "TS",
"kind": "absolute_maximum",
"unit": "°C",
"min": -55,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Thermal resistance junction to ambient",
"symbol": "RthA",
"kind": "thermal",
"unit": "K/W",
"min": null,
"typ": null,
"max": 200,
"conditions": "Valid if leads kept at ambient temperature at a distance of 2 mm from case",
"source_page": 2,
"source": "datasheet"
},
{
"name": "DC current gain Group A",
"symbol": "hFE",
"kind": "electrical",
"unit": "",
"min": 110,
"typ": null,
"max": 220,
"conditions": "VCE = 5 V, IC = 2 mA, Group A",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Collector-Emitter saturation voltage",
"symbol": "VCEsat",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 80,
"max": 250,
"conditions": "IC = 10 mA, IB = 0.5 mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Collector-Emitter saturation voltage",
"symbol": "VCEsat",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 200,
"max": 600,
"conditions": "IC = 100 mA, IB = 5 mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Base-Emitter-voltage",
"symbol": "VBE",
"kind": "electrical",
"unit": "mV",
"min": 580,
"typ": 660,
"max": 700,
"conditions": "VCE = 5 V, IC = 2 mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Base-Emitter-voltage",
"symbol": "VBE",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": null,
"max": 770,
"conditions": "VCE = 5 V, IC = 10 mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Collector-Emitter cutoff current",
"symbol": "ICES",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": 0.2,
"max": 15,
"conditions": "VCE = 30 V, B-E short, BC548/BC549, Tj = 25°C",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Collector-Emitter cutoff current",
"symbol": "ICES",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 4,
"conditions": "VCE = 30 V, B-E short, BC548/BC549, Tj = 125°C",
"source_page": 2,
"source": "datasheet"
},
{
"name": "DC current gain Group A",
"symbol": "hFE",
"kind": "electrical",
"unit": "",
"min": null,
"typ": 90,
"max": null,
"conditions": "VCE = 5 V, IC = 10 µA, Group A",
"source_page": 2,
"source": "datasheet"
},
{
"name": "DC current gain Group A",
"symbol": "hFE",
"kind": "electrical",
"unit": "",
"min": null,
"typ": 120,
"max": null,
"conditions": "IC = 100 mA, Group A",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Base-Emitter saturation voltage",
"symbol": "VBEsat",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 700,
"max": null,
"conditions": "IC = 10 mA, IB = 0.5 mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Base-Emitter saturation voltage",
"symbol": "VBEsat",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 900,
"max": null,
"conditions": "IC = 100 mA, IB = 5 mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Gain-Bandwidth Product",
"symbol": "fT",
"kind": "electrical",
"unit": "MHz",
"min": null,
"typ": 300,
"max": null,
"conditions": "VCE = 5 V, IC = 10 mA, f = 100 MHz",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Collector-Base Capacitance",
"symbol": "CCBO",
"kind": "electrical",
"unit": "pF",
"min": null,
"typ": 3.5,
"max": 6,
"conditions": "VCB = 10 V, IE = ie = 0, f = 1 MHz",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Emitter-Base Capacitance",
"symbol": "CEBO",
"kind": "electrical",
"unit": "pF",
"min": null,
"typ": 9,
"max": null,
"conditions": "VEB = 0.5 V, IC = ic = 0, f = 1 MHz",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Noise figure",
"symbol": "F",
"kind": "electrical",
"unit": "dB",
"min": null,
"typ": 2,
"max": 10,
"conditions": "VCE = 5 V, IC = 200 µA, RG = 2 kΩ, f = 1 kHz, Δf = 200 Hz",
"source_page": 2,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"bc548a"
],
"discovery_pitch": "BC548A (DIOTEC) 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",
"bc548a.kicad_sym",
"bc548a.kicad_mod",
"bc548a.glb",
"bc548a.step",
"bc548a.lbr",
"docs/hero.png",
"docs/bc548a-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"bc548a-hero.glb",
"bc548a-hero.overlay.json",
"bc548a-etched.glb"
],
"visibility": {
"public": true
}
}