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BAT54A-HAF
Public Made by Adomby adom
ST(Semtech) Schottky Barrier Diodes (SBD), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownBAT54A-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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bat54a-haf.step/bat54a-haf.glbare 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, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).