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BCW66GR

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Nexperia Bipolar Transistors - BJT, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componenttransistorsbcw66grfactory-2.0.0extractor-text

Verified BCW66GR

by Ray · last 13 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

13 Nov 2026RayPublished by the parts factory: tier mfr, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • •array (skip): not an array of element pairs
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: BCW66GR · SOT-23 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 14-page datasheet
  • ✓distributor: lcsc C549642, digikey 1727-BCW66GRTR-ND, mouser 771-BCW66GR
  • ✓family: SOT-23
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-dhapo42h/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.9)
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓symbol_text: no pin names collide
  • ✓viewers: viewers/footprint.html 17 kB, viewers/symbol.html 7 kB
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ bcw66gr.kicad_sym✓ bcw66gr.kicad_mod✓ bcw66gr.step
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3D Model

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Symbol & Footprint

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PCB Footprint

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Datasheet

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Contents

README

markdown

BCW66GR

Nexperia · Bipolar Transistors - BJT · SOT-23

BCW66GR from Nexperia, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model). Symbol and footprint from KiCad-official CAD; the 3D model is generated from the datasheet's package dimensions.

Pinout

Pin Name Type Function
1 B passive Base terminal; the datasheet sets the base current limit at 100 mA (IB) and the peak base current at 200 mA (IBM, single pulse, tp ≤ 1 ms).
2 E passive Emitter terminal; the emitter-base voltage is limited to 5 V (VEBO) with the collector open.
3 C passive Collector terminal; the datasheet limits the collector-emitter voltage to 45 V (VCEO, open base) and the collector current to 800 mA (IC).

Key specifications

Parameter Value
Manufacturer Nexperia
Package SOT-23
Category Transistors
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Collector-base voltage VCBO 50 V open emitter 2
Collector-emitter voltage VCEO 45 V open base 2
Emitter-base voltage VEBO 5 V open collector 2
Collector current IC 800 mA 2
Peak collector current ICM 1 A single pulse; tp ≤ 1 ms 2
Base current IB 100 mA 2
Peak base current IBM 200 mA single pulse; tp ≤ 1 ms 3
Total power dissipation Ptot 250 mW Tamb ≤ 25 °C; device mounted on FR4 PCB, single-sided, standard footprint 3
Junction temperature Tj 150 °C 3
Ambient temperature Tamb -55 150 °C 3
Storage temperature Tstg -65 150 °C 3
Thermal resistance from junction to ambient Rth(j-a) 500 K/W in free air; device mounted on FR4 PCB, single-sided copper, standard footprint 3
Collector-base cut-off current ICBO 20 nA VCB = 40 V; IE = 0 A 4
Collector-base cut-off current (high temperature) ICBO 5 μA VCB = 40 V; IE = 0 A; Tj = 150 °C 4
Emitter-base cut-off current IEBO 20 nA VEB = 5 V; IC = 0 A 4
DC current gain hFE 75 VCE = 1 V; IC = 100 μA 4
DC current gain (BCW66G) hFE 160 400 VCE = 1 V; IC = 100 mA; pulsed: tp ≤ 300 μs, δ ≤ 0.02 4
DC current gain hFE 40 VCE = 1 V; IC = 500 mA; pulsed: tp ≤ 300 μs, δ ≤ 0.02 4
Collector-emitter saturation voltage VCEsat 350 mV IC = 100 mA; IB = 10 mA; pulsed; tp ≤ 300 μs; δ ≤ 0.02 4
Collector-emitter saturation voltage VCEsat 450 mV IC = 500 mA; IB = 50 mA; pulsed; tp ≤ 300 μs; δ ≤ 0.02 4
Base-emitter saturation voltage VBEsat 1.25 V IC = 100 mA; IB = 10 mA; pulsed; tp ≤ 300 μs; δ ≤ 0.02 4
Transition frequency fT 100 MHz VCE = 5 V; IC = 10 mA; f = 100 MHz 4

CAD (land: KiCad; 3D: generated from the datasheet)

  • Symbol: BCW66GR
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23, generated on the KiCad land (body 1.3 x 2.9 mm, terminals on the pads, 1.0 mm tall, datasheet A, midpoint of min and max). KiCad's stock model for this land is taller than the datasheet allows, so the model is generated from the datasheet drawing; the dimensions come from the datasheet drawing where it was read and are defaults otherwise (see provenance.model_3d_generated), not the manufacturer's CAD (STEP)
  • 3D model files: bcw66gr-etched.step / bcw66gr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bcw66gr.step / bcw66gr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Nexperia datasheet (14 pp, sha256 6a1bc1da706875ce, retrieved 2026-11-13, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: land: KiCad official libraries (CC-BY-SA 4.0); 3D: generated from the datasheet's package dimensions (provenance.model_3d_generated).

Datasheet PDF