component

BD679AS

Public Made by Adom

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onsemi Pre-ordered Products, TO-126-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentsolders - accessories - batteriesbd679asfactory-2.0.0extractor-text

Verified BD679AS

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier mfr, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: BD679AS · TO-126-3 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 6-page datasheet
  • ✓distributor: lcsc C900824, digikey BD679AS-ND, mouser 512-BD679AS
  • ✓family: TO-126-3_Vertical
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-_58qoeim/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ bd679as.kicad_sym✓ bd679as.kicad_mod✓ bd679as.step
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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

markdown

BD679AS

onsemi · Pre-ordered Products · TO-126-3

BD679AS from onsemi, in a TO-126-3. 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 Emitter passive Emitter of the NPN Darlington transistor, with emitter-base voltage VEBO rated at 5 V and emitter-base cut-off current IEBO specified at 2 mA maximum with VEB = 5 V.
2 Collector passive Collector of the BD679A, rated at 80 V VCEO, 4 A DC collector current (6 A pulsed), and 40 W collector dissipation at TC = 25°C.
3 Base passive Base of the Darlington transistor, with base current IB rated at 100 mA maximum.

Key specifications

Parameter Value
Manufacturer onsemi
Package TO-126-3
Category Solders / Accessories / Batteries
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 (BD679A) VCBO 80 V 2
Collector-Emitter Voltage (BD679A) VCEO 80 V 2
Emitter-Base Voltage VEBO 5 V 2
Collector Current (DC) IC 4 A 2
Collector Current (Pulse) ICP 6 A 2
Base Current IB 100 mA 2
Collector Dissipation PC 40 W TC=25°C 2
Junction Temperature TJ 150 °C 2
Storage Temperature TSTG -65 150 °C 2
Collector-Emitter Sustaining Voltage (BD679A) VCEO(sus) 80 V IC = 50mA, IB = 0 2
Collector Cut-off Current (BD679A) ICBO 200 µA VCB = 80V, IE = 0 2
Collector Cut-off Current (BD679A) ICEO 500 µA VCE = 80V, VBE = 0 2
Emitter Cut-off Current IEBO 2 mA VEB = 5V, IC = 0 2
DC Current Gain (BD675A/677A/679A) hFE 750 VCE = 3V, IC = 2A 2
Collector-Emitter Saturation Voltage (BD675A/677A/679A) VCE(sat) 2.8 V IC = 2A, IB = 40mA 2
Base-Emitter ON Voltage (BD675A/677A/679A) VBE(on) 2.5 V VCE = 3V, IC = 2A 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
housing PC IB Base Current 100 mA PC Collector Dissipation (TC=25°C) 40 W 2

CAD (KiCad official)

  • Symbol: BD679AS
  • Footprint: Package_TO_SOT_THT:TO-126-3_Vertical
  • 3D model: TO-126-3 (KiCad packages3D, STEP)
  • 3D model files: bd679as-etched.step / bd679as-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bd679as.step / bd679as.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (6 pp, sha256 31f0a289df78e3f3, retrieved 2026-10-30, 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