component

BC817-40WT1G

Public Made by Adom

by adom

onsemi Bipolar (BJT), SC-70. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componenttransistors-thyristorsbc817-40wt1gfactory-2.0.0extractor-text

Verified BC817-40WT1G

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

Verification log 1 record

13 Nov 2026RayPublished by the parts factory: tier lcsc, 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: BC817-40WT1G · SC-70 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 5-page datasheet
  • ✓distributor: lcsc C605312, digikey BC817-40WT1GOSTR-ND, mouser 863-BC817-40WT1G
  • ✓family: SOT-323_SC-70
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-203rbwf9/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.5)
  • ✓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✓ bc817-40wt1g.kicad_sym✓ bc817-40wt1g.kicad_mod✓ bc817-40wt1g.step
Spot something wrong? Report it as an issue Propose a fix Records are signed by members of adom.
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

PCB Footprint

Open full view ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

Datasheet

Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Download PDF
Contents

README

markdown

BC817-40WT1G

onsemi · Bipolar (BJT) · SC-70

BC817-40WT1G from onsemi, in a SC-70. 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 BASE passive BASE terminal of the NPN general-purpose transistor; the datasheet gives no separate base-pin limit, and the Emitter−Base voltage VEBO is rated 5.0 V maximum.
2 EMITTER passive EMITTER terminal of the NPN transistor, with the Emitter−Base voltage VEBO rated at 5.0 V.
3 COLLECTOR passive COLLECTOR terminal of the NPN transistor, with a Collector−Emitter voltage VCEO of 45 V and continuous collector current IC of 500 mA.

Key specifications

Parameter Value
Manufacturer onsemi
Package SC-70
Category Transistors/Thyristors
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−Emitter Voltage VCEO 45 V TA = 25°C 1
Collector−Base Voltage VCBO 50 V TA = 25°C 1
Emitter−Base Voltage VEBO 5 V TA = 25°C 1
Collector Current − Continuous IC 500 mAdc TA = 25°C 1
Total Device Dissipation PD 460 mW FR-4 board, 1 oz. Cu, 100 mm2 (Note 1) 1
Thermal Resistance, Junction-to-Ambient RJA 272 °C/W FR-4 board, 1 oz. Cu, 100 mm2 (Note 1) 1
Junction and Storage Temperature Range TJ, Tstg -55 150 °C 1
Collector−Emitter Breakdown Voltage V(VR)CEO 45 V IC = 10 mA 2
Collector−Emitter Breakdown Voltage V(VR)CES 50 V VEB = 0 V, IC = 10 A 2
Emitter−Base Breakdown Voltage V(VR)EBO 5 V IE = 1.0 A 2
Collector Cutoff Current ICBO 100 nA VCB = 20 V 2
Collector Cutoff Current ICBO 5 A VCB = 20 V, TA = 150°C 2
DC Current Gain hFE 250 600 IC = 100 mA, VCE = 1.0 V 2
DC Current Gain hFE 40 IC = 500 mA, VCE = 1.0 V 2
Collector−Emitter Saturation Voltage VCE(sat) 0.7 V IC = 500 mA, IB = 50 mA 2
Base−Emitter On Voltage VBE(on) 1.2 V IC = 500 mA, VCE = 1.0 V 2
Current−Gain − Bandwidth Product fT 100 MHz IC = 10 mA, VCE = 5.0 V, f = 100 MHz 2

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

  • Symbol: BC817-40WT1G
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SC-70, generated on the KiCad land (body 1.24 x 2.1 mm, terminals on the pads, 0.9 mm tall, datasheet A, nominal). 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: bc817-40wt1g-etched.step / bc817-40wt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bc817-40wt1g.step / bc817-40wt1g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (5 pp, sha256 ef219f987cc349a7, retrieved 2026-11-13, tier: lcsc)
  • 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