component
2SD1857L-Q-T92-B
Public Made by Adomby adom
UTC Unisonic Tech Bipolar (BJT), TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403
{
"schema_version": 1,
"type": "component",
"slug": "2sd1857l-q-t92-b",
"title": "2SD1857L-Q-T92-B",
"brief": "UTC Unisonic Tech 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",
"2sd1857l-q-t92-b",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "2SD1857L-Q-T92-B",
"manufacturer": "UTC Unisonic Tech",
"package": "TO-92",
"pin_count": 3,
"category": "Transistors/Thyristors",
"subcategory": "Bipolar (BJT)",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588887276097454080",
"parts": {
"symbol": "2sd1857l-q-t92-b.kicad_sym",
"footprint": "2sd1857l-q-t92-b.kicad_mod",
"model_3d": "2sd1857l-q-t92-b-hero.glb",
"model_3d_plain": "2sd1857l-q-t92-b-etched.glb",
"model_3d_step": "2sd1857l-q-t92-b-etched.step",
"model_3d_step_plain": "2sd1857l-q-t92-b.step",
"lbr": "2sd1857l-q-t92-b.lbr"
},
"distributor_links": {
"lcsc": "C87294"
},
"distributor_check": {
"checked_at": "2026-10-18T00:46:14Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "E",
"type": "passive",
"description": "Emitter terminal of the NPN transistor; the datasheet rates emitter-base voltage VEBO at 5 V max and BVEBO at 5 V (IE=50µA)."
},
{
"number": "2",
"name": "C",
"type": "passive",
"description": "Collector terminal of the NPN transistor; rated VCEO 120 V and VCBO 120 V, continuous IC 2 A, peak ICP 3 A, and TO-92 collector power dissipation PC 0.625 W."
},
{
"number": "3",
"name": "B",
"type": "passive",
"description": "Base terminal of the NPN transistor; DC current gain hFE is 82 to 390 at VCE=5V, IC=0.1A, with rank Q at 120-270."
}
],
"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 TO-92 pin assignment only as a column in the ordering table (header '1 2 3' ; The requested MPN 2SD1857L-Q-T92-B matches the ordering pattern 2SD1857L-x-T92-B with x=Q (hFE rank ; Pin types are inferred as passive because the datasheet names terminals only as emitter, collector a"
],
"pages_sent": 4,
"cost_usd": 0.0255,
"at": "2026-10-18T00:42:23"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588887276097454080",
"pages": 4,
"sha256": "3f19025064c70e0a",
"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": "2sd1857l-q-t92-b.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": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "2sd1857l-q-t92-b-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": "66748474221f372aa5c11dcc87d17c412ed05f6d05ebfdacad8deede07e3e543",
"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "UTC Unisonic Tech",
"Package": "TO-92",
"Category": "Transistors/Thyristors",
"Pins": "3"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "3f19025064c70e0ab24f24e2626c4d2c3cf412adfef43c79dc0caaa1ba4363e3",
"rows": [
{
"name": "Collector-Base Breakdown Voltage",
"symbol": "BVCBO",
"kind": "electrical",
"unit": "V",
"min": 120,
"typ": null,
"max": null,
"conditions": "IC=50µA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Collector-Emitter Breakdown Voltage",
"symbol": "BVCEO",
"kind": "electrical",
"unit": "V",
"min": 120,
"typ": null,
"max": null,
"conditions": "IC=1mA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Emitter-Base Breakdown Voltage",
"symbol": "BVEBO",
"kind": "electrical",
"unit": "V",
"min": 5,
"typ": null,
"max": null,
"conditions": "IE=50µA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Collector Cut-Off Current",
"symbol": "ICBO",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 1,
"conditions": "VCB=100V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Emitter Cut-Off Current",
"symbol": "IEBO",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 1,
"conditions": "VEB=4V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "DC Current Transfer Ratio",
"symbol": "hFE",
"kind": "electrical",
"unit": "",
"min": 82,
"typ": null,
"max": 390,
"conditions": "VCE=5V, IC=0.1A",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Collector-Emitter Saturation Voltage",
"symbol": "VCE(SAT)",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.4,
"conditions": "IC=/IB=1A/0.1A (Note)",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Transition Frequency",
"symbol": "fT",
"kind": "electrical",
"unit": "MHz",
"min": 80,
"typ": null,
"max": null,
"conditions": "VCE=5V, IE= -0.1A, f=30MHz.",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Output Capacitance",
"symbol": "COB",
"kind": "electrical",
"unit": "pF",
"min": null,
"typ": 20,
"max": null,
"conditions": "VCB=10V, IE=0A, f=1MHz (Note)",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Collector-Base Voltage",
"symbol": "VCBO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 120,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Collector-Emitter Voltage",
"symbol": "VCEO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 120,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Emitter-Base Voltage",
"symbol": "VEBO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 5,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Collector Current",
"symbol": "IC",
"kind": "absolute_maximum",
"unit": "A",
"min": null,
"typ": null,
"max": 2,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Collector Current (pulse)",
"symbol": "ICP",
"kind": "absolute_maximum",
"unit": "A",
"min": null,
"typ": null,
"max": 3,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Collector Power Dissipation",
"symbol": "PC",
"kind": "absolute_maximum",
"unit": "W",
"min": null,
"typ": null,
"max": 0.625,
"conditions": "TO-92",
"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": "Storage Temperature",
"symbol": "TSTG",
"kind": "absolute_maximum",
"unit": "°C",
"min": -40,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 3,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"2sd1857l-q-t92-b"
],
"discovery_pitch": "2SD1857L-Q-T92-B (UTC Unisonic Tech) 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",
"2sd1857l-q-t92-b.kicad_sym",
"2sd1857l-q-t92-b.kicad_mod",
"2sd1857l-q-t92-b.glb",
"2sd1857l-q-t92-b.step",
"2sd1857l-q-t92-b.lbr",
"docs/hero.png",
"docs/2sd1857l-q-t92-b-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"2sd1857l-q-t92-b-hero.glb",
"2sd1857l-q-t92-b-hero.overlay.json",
"2sd1857l-q-t92-b-etched.glb"
],
"visibility": {
"public": true
}
}