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BC817K-40VL

Public Made by Adom

by adom

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

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BC817K-40VL

Nexperia · Bipolar Transistors - BJT · SOT-23

BC817K-40VL from Nexperia, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 B input Base; peak base current IBM is limited to 200 mA for a single pulse with tp ≤ 1 ms.
2 E passive Emitter; emitter-base voltage VEBO is limited to 5 V with the collector open.
3 C passive Collector; collector-emitter voltage VCEO is limited to 45 V and collector current IC to 500 mA.

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 breakdown voltage V(BR)CBO 50 V IC = 100 µA; IE = 0 A 7
collector-emitter breakdown voltage V(BR)CEO 45 V IC = 10 mA; IB = 0 A 7
emitter-base breakdown voltage V(BR)EBO 5 V IE = 100 µA; IC = 0 A 7
collector-base cut-off current ICBO 100 nA VCB = 25 V; IE = 0 A 7
collector-base cut-off current at Tj 150 °C ICBO 5 μA VCB = 25 V; IE = 0 A; Tj = 150 °C 7
emitter-base cut-off current IEBO 100 nA VEB = 5 V; IC = 0 A 7
DC current gain BC817K-40 hFE 250 600 - VCE = 1 V; IC = 100 mA; pulsed tp ≤ 300 μs; δ ≤ 0.02 7
DC current gain BC817K-16, -25, -40 hFE 40 - VCE = 1 V; IC = 500 mA; pulsed tp ≤ 300 μs; δ ≤ 0.02 7
collector-emitter saturation voltage VCEsat 700 mV IC = 500 mA; IB = 50 mA; pulsed tp ≤ 300 μs; δ ≤ 0.02 7
base-emitter saturation voltage VBEsat 1.2 V IC = 500 mA; IB = 50 mA; pulsed tp ≤ 300 μs; δ ≤ 0.02 7
base-emitter voltage VBE 1.2 V VCE = 1 V; IC = 500 mA; pulsed tp ≤ 300 μs; δ ≤ 0.02 7
transition frequency fT 100 MHz VCE = 5 V; IC = 10 mA; f = 100 MHz 7
collector-base voltage VCBO 50 V open emitter 3
collector-emitter voltage VCEO 45 V open base 3
emitter-base voltage VEBO 5 V open collector 3
collector current IC 500 mA 3
peak collector current ICM 1 A single pulse; tp ≤ 1 ms 3
peak base current IBM 200 mA single pulse; tp ≤ 1 ms 3
total power dissipation Ptot 350 mW Tamb ≤ 25 °C; FR4 PCB, single-sided copper, tin-plated, standard footprint 3
total power dissipation Ptot 575 mW Tamb ≤ 25 °C; FR4 PCB, single-sided copper, tin-plated, mounting pad for collector 1 cm2 3
total power dissipation Ptot 775 mW Tamb ≤ 25 °C; FR4 PCB, 4-layer copper, tin-plated, mounting pad for collector 1 cm2 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) 358 K/W in free air; FR4 PCB, single-sided copper, tin-plated, standard footprint 5
thermal resistance from junction to ambient Rth(j-a) 218 K/W in free air; FR4 PCB, single-sided copper, tin-plated, mounting pad for collector 1 cm2 5
thermal resistance from junction to ambient Rth(j-a) 162 K/W in free air; FR4 PCB, 4-layer copper, tin-plated, mounting pad for collector 1 cm2 5
thermal resistance from junction to solder point Rth(j-sp) 60 K/W 5
collector capacitance Cc 3 pF VCB = 10 V; IE = ie = 0 A; f = 1 MHz 7
emitter capacitance BC817K-40 Ce 39 pF VEB = 0.5 V; IC = ic = 0 A; f = 1 MHz 7

CAD (KiCad official)

  • Symbol: BC817K-40VL
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: bc817k-40vl-etched.step / bc817k-40vl-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bc817k-40vl.step / bc817k-40vl.glb are the bare package body.

Provenance

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

  • Datasheet: Nexperia datasheet (24 pp, sha256 4f60405af7f3ea94, retrieved 2026-10-28, 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: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF