component

BU508AW

Public Made by Adom

by adom

STMicroelectronics Bipolar (BJT), TO-247. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componenttransistors-thyristorsbu508awfactory-2.0.0extractor-text

Verified BU508AW

by Ray · last 12 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

12 Nov 2026RayPublished by the parts factory: tier lcsc, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: BU508AW · TO-247 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 11-page datasheet
  • ✓distributor: lcsc C93604, digikey 497-7196-5-ND, mouser 511-BU508AW
  • ✓family: TO-247-3_Vertical
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-ud3yujft/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: thickness within the datasheet's package drawing (vertical TO package); standing height not judged: the drawing read gives no overall height (H, H1 or L) (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 16 kB, viewers/symbol.html 7 kB
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ bu508aw.kicad_sym✓ bu508aw.kicad_mod✓ bu508aw.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
main
Download ZIP Propose a change
Made with kicad-footprint-generator 10.0 · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray
viewers bu508aw: viewers rendered from the public page · Ray
bu508aw-etched.glb bu508aw: factory component page (tier=lcsc) · Ray
bu508aw-etched.step bu508aw: factory component page (tier=lcsc) · Ray
bu508aw-hero.glb bu508aw: hero GLB from the etched model (keeps the MPN mark) · Ray
bu508aw-hero.overlay.json bu508aw: hero GLB from the etched model (keeps the MPN mark) · Ray
bu508aw.glb Publish 0.1.0 · Ray
bu508aw.kicad_mod Publish 0.1.0 · Ray
bu508aw.kicad_sym Publish 0.1.0 · Ray
bu508aw.lbr Publish 0.1.0 · Ray
bu508aw.step Publish 0.1.0 · Ray
package.json Publish 0.1.0 · Ray
page.json Set visibility: public · Ray
README.md Publish 0.1.0 · Ray
verification.json Verified: Published by the parts factory: tier lcsc, 3 pins · Ray

BU508AW

STMicroelectronics · Bipolar (BJT) · TO-247

BU508AW from STMicroelectronics, in a TO-247. 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 of the NPN transistor; base current IB is rated to 4 A maximum and VEBO to 9 V.
2 C passive Collector of the NPN transistor; VCES is 1500 V, VCEO is 700 V, and IC is 8 A continuous (15 A peak, tP < 5 ms).
3 E passive Emitter of the NPN transistor, the common return for the base drive and collector current.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package TO-247
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 (VBE = 0) VCES 1500 V VBE = 0 3
Collector-emitter voltage (IB = 0) VCEO 700 V IB = 0 3
Collector-base voltage (IC = 0) VEBO 9 V IC = 0 3
Collector current IC 8 A 3
Collector peak current ICM 15 A tP < 5ms 3
Base current IB 4 A 3
Total dissipation PTOT 125 W Tc = 25°C 3
Storage temperature Tstg -65 150 °C 3
Max. operating junction temperature TJ 150 °C 3
Thermal resistance junction-case Rthj-case 1 °C/W 3
Collector cut-off current (VBE = 0) ICES 0.2 mA VCE = 1500V 4
Collector cut-off current (VBE = 0) ICES 2 mA VCE = 1500V; TC = 125°C 4
Emitter cut-off current (IC = 0) IEBO 1 mA VEB = 9V 4
Collector-emitter saturation voltage VCE(sat) 1 V IC = 4.5A IB = 1.6A; pulsed: pulse duration = 300 ms, duty cycle 1.5 % 4
Base-emitter saturation voltage VBE(sat) 1.1 V IC = 4.5A IB = 2A 4
DC current gain hFE 10 IC = 0.1A VCE = 5V 4
DC current gain hFE 5 30 IC = 4.5A VCE = 5V 4

CAD (KiCad official)

  • Symbol: BU508AW
  • Footprint: Package_TO_SOT_THT:TO-247-3_Vertical
  • 3D model: TO-247 (KiCad packages3D, STEP)
  • 3D model files: bu508aw-etched.step / bu508aw-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bu508aw.step / bu508aw.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (11 pp, sha256 74d16a9ca70e669f, retrieved 2026-11-12, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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