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BAT54A-HAF

Public Made by Adom

by adom

ST(Semtech) Schottky Barrier Diodes (SBD), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BAT54A-HAF

ST(Semtech) · Schottky Barrier Diodes (SBD) · SOT-23

BAT54A-HAF from ST(Semtech), 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 K1 passive Cathode of diode 1 in the BAT54A dual common-anode Schottky pair, rated 30 V VRRM and 300 mA average forward current (IF(AV)).
2 K2 passive Cathode of diode 2 in the BAT54A dual common-anode Schottky pair, rated 30 V VRRM and 350 mA repetitive peak forward current (IFRM) per diode.
3 A passive Common anode of both Schottky diodes in the BAT54A, with 290 mW total package power dissipation.

Key specifications

Parameter Value
Manufacturer ST(Semtech)
Package SOT-23
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
Repetitive Peak Reverse Voltage VRRM 30 V Ta = 25℃ 1
Average Rectified Forward Current IF(AV) 300 mA Ta = 25℃ 1
Repetitive Peak Forward Surge Current IFRM 350 mA t ≤ 1s, Duty ≤ 0.5, Per diode 1
Non-repetitive Peak Forward Surge Current IFSM 600 mA Pulse width = 1 second 1
Power Dissipation Ptot 290 mW Ta = 25℃ 1
Operating Junction Temperature Range Tj -55 150 ℃ 1
Storage Temperature Range Tstg -55 150 ℃ 1
Thermal Resistance Junction to Ambient RθJA 430 ℃/W Device mounted on FR-4 substrate PC board, 2oz copper, minimum recommended pad layout 1
Reverse Breakdown Voltage V(BR)R 30 V IR = 100 μA 2
Forward Voltage VF 240 mV IF = 0.1 mA 2
Forward Voltage VF 320 mV IF = 1 mA 2
Forward Voltage VF 400 mV IF = 10 mA 2
Forward Voltage VF 500 mV IF = 30 mA 2
Forward Voltage VF 800 mV IF = 100 mA 2
Reverse Current IR 2 μA VR = 25 V 2
Total Capacitance Ctot 10 pF VR = 1 V, f = 1 MHz 2
Reverse Recovery Time trr 5 ns IF = 10 mA, IR = 10 mA, IRR = 1 mA, RL = 100 Ω 2

CAD (KiCad official)

  • Symbol: BAT54A-HAF
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: bat54a-haf-etched.step / bat54a-haf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bat54a-haf.step / bat54a-haf.glb are the bare package body.

Provenance

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

  • Datasheet: ST(Semtech) datasheet (4 pp, sha256 83ab0a7569cdc9ff, retrieved 2026-10-22, 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