component
BCX42
Public Made by Adomby adom
YFW Bipolar (BJT), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"slug": "bcx42",
"title": "BCX42",
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"license": "CC-BY-SA-4.0",
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"source": "Component Ocean /api/assign-pns",
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"status": "quota"
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"mouser": {
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"type": "input",
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},
{
"number": "2",
"name": "E",
"type": "passive",
"description": "Emitter of the PNP transistor; emitter-base breakdown BVEBO is -5 V."
},
{
"number": "3",
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}
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"primary_mode": "text+vision",
"consensus_model": "claude-opus-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The datasheet only labels the leads B, E and C in the package picture on page 1. It prints no pin nu; The datasheet does not state ERC electrical types. I picked base as input and the emitter and collec",
"vision extraction: provenance cannot be text-verified; needs consensus"
],
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"cost_usd": 0.1787,
"at": "2026-10-17T14:29:46"
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"sha256": "de7ba898e04f78fa",
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"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
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"described": 3,
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"refuses_to_fabricate": true
}
},
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"footprint": "viewers/footprint.html"
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"checked": "2026-10-17",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "bcx42-etched.step",
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},
"metadata": {
"specs": {
"Manufacturer": "YFW",
"Package": "SOT-23",
"Category": "Transistors/Thyristors",
"Pins": "3"
},
"characteristics": {
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},
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"kind": "electrical",
"unit": "μA",
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"typ": null,
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"conditions": "VCB = -100V, IE = 0",
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{
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"typ": null,
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{
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"kind": "electrical",
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"conditions": "VEB = -4V, IC = 0",
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{
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{
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"typ": null,
"max": -0.9,
"conditions": "IC = -300mA, IB = -30mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Base-emitter saturation voltage",
"symbol": "VBE(sat)",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": -1.4,
"conditions": "IC = -300mA, IB = -30mA",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Gian bandwidth product",
"symbol": "fT",
"kind": "electrical",
"unit": "MHZ",
"min": 150,
"typ": null,
"max": null,
"conditions": "VCE = -5V, IC = -20mA, f=20MHz",
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{
"name": "Collector-base capacitance",
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},
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"sections": [
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],
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],
"discovery_pitch": "BCX42 (YFW) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
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}
}