component
SJD12A26L01
Public Made by Adomby adom
Liown ESD Protection Devices, SOD-123FL. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Contents
README
markdownSJD12A26L01
Liown · ESD Protection Devices · SOD-123FL
SJD12A26L01 from Liown, in a SOD-123FL. 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 | K | passive | Cathode (marked by the cathode band on the unidirectional SJD12A26L01), connects to the protected line with 26V reverse stand-off, 28.9-31.9V breakdown at 1mA and 42.1V maximum clamping at 4.8A. |
| 2 | A | passive | Anode (end opposite the cathode band), normally connected to ground, with forward voltage of 3.5V maximum at 12A for the unidirectional device. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Liown |
| Package | SOD-123FL |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 2 |
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 Stand-Off Voltage | VR | 26 | V | 2 | |||
| Breakdown Voltage | VB | 28.9 | 31.9 | V | @IT = 1 mA | 2 | |
| Maximum Clamping Voltage | VC | 42.1 | V | @IPP = 4.8 A | 2 | ||
| Reverse Leakage | IR | 1 | μA | @VR | 2 | ||
| Peak Pulse Current | IPP | 4.8 | A | 2 | |||
| Peak pulse power dissipation | PPPM | 200 | W | 10/1000μs waveform, TA=25℃ | 1 | ||
| Peak pulse power | PPPM | 1000 | W | tp=8/20μs waveform, TA=25℃ | 1 | ||
| Steady state power dissipation | PM(AV) | 1 | W | TL=75℃ | 1 | ||
| Maximum Instantaneous Forward Voltage | VF | 3.5 | V | at 12A, Unidirectional only | 1 | ||
| Peak forward surge current | IFSM | 20 | A | 8.3ms single half sine-wave, JEDEC Method | 1 | ||
| Operating junction and storage temperature | TJ,TSTG | -55 | 150 | ℃ | 1 | ||
| Thermal resistance junction to lead | RθJL | 100 | ℃/W | Typical | 1 | ||
| Thermal resistance junction to ambient | RθJA | 220 | ℃/W | Typical | 1 |
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 |
|---|---|---|---|---|
| contacts | copper | 2. Each terminal is surface Mounted on the 5.0mm×5.0mm (0.03mm thick) copper pads. | 1 |
CAD (KiCad official)
- Symbol:
SJD12A26L01 - Footprint:
Diode_SMD:D_SOD-123F - 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files:
sjd12a26l01-etched.step/sjd12a26l01-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sjd12a26l01.step/sjd12a26l01.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Liown datasheet (7 pp, sha256
2af73f617a9b968b, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).