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BAS19W

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ST Semtech Switching Diodes, SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BAS19W

ST Semtech · Switching Diodes · SOT-323

BAS19W from ST Semtech, in a SOT-323. 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 A passive Anode of the single high-voltage switching diode (BAS19W: VR 120 V, IF(AV) 200 mA, IFRM 625 mA).
2 NC unconnected No internal connection to the diode in the single-diode BAS19W/BAS20W/BAS21W symbol.
3 K passive Cathode of the single high-voltage switching diode (BAS19W: VR 120 V, IF(AV) 200 mA, IFRM 625 mA).

Key specifications

Parameter Value
Manufacturer ST Semtech
Package SOT-323
Category Diodes
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
Reverse Breakdown Voltage V(BR)R 120 V at IR = 100 µA 2
Forward Voltage VF 1 V at IF = 100 mA 2
Forward Voltage VF 1.25 V at IF = 200 mA 2
Reverse Current IR 0.1 µA at VR = 100 V 2
Reverse Current IR 100 µA at VR = 100 V, Tj = 150℃ 2
Total Capacitance Ctot 5 pF at VR = 0, f = 1 MHz 2
Reverse Recovery Time trr 50 ns at IF = IR = 30 mA, RL = 100 Ω, Irr = 0.1 X IR 2
Reverse Voltage VR 120 V 1
Continuous Forward Current IF(AV) 200 mA 1
Repetitive Peak Forward Current IFRM 625 mA 1
Non-repetitive Peak Forward Surge Current IFSM 0.5 A t = 1 s 1
Non-repetitive Peak Forward Surge Current IFSM 2.5 A t = 1 μs 1
Total Device Dissipation Ptot 250 mW 1
Junction and Storage Temperature Range Tj, Tstg -55 150 ℃ 1
Thermal Resistance, Junction to Ambient RθJA 500 ℃/W Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout 1

CAD (KiCad official)

  • Symbol: BAS19W
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SOT-323 (KiCad packages3D, STEP)
  • 3D model files: bas19w-etched.step / bas19w-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bas19w.step / bas19w.glb are the bare package body.

Provenance

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

  • Datasheet: ST Semtech datasheet (4 pp, sha256 8928ec7bbef1fce2, retrieved 2026-10-17, 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