component
TL431D
Public Made by Adomby adom
ALJ Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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TL431D
ALJ · Voltage Reference · SOT-23
TL431D from ALJ, 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 | REFERENCE | input | Reference input of the adjustable shunt regulator, which is regulated to VREF of 2.485 V min, 2.495 V typ and 2.505 V max at VKA = VREF and IKA = 1 mA. |
| 2 | CATHODE | passive | Cathode terminal, rated to 40 V absolute maximum with a continuous cathode current of -100 to 120 mA, and recommended operating up to 36 V with IKA of 0.1 to 100 mA. |
| 3 | ANODE | passive | Anode terminal, the other current-carrying terminal of the shunt regulator, which must sink at least 40 µA typ (80 µA max) of cathode current for regulation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ALJ |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
TL431D - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
tl431d-etched.step/tl431d-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431d.step/tl431d.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ALJ datasheet (9 pp, sha256
20bc8649b08decae, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).
# TL431D
**ALJ** · Voltage Reference · SOT-23
TL431D from ALJ, 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 | REFERENCE | input | Reference input of the adjustable shunt regulator, which is regulated to VREF of 2.485 V min, 2.495 V typ and 2.505 V max at VKA = VREF and IKA = 1 mA. |
| 2 | CATHODE | passive | Cathode terminal, rated to 40 V absolute maximum with a continuous cathode current of -100 to 120 mA, and recommended operating up to 36 V with IKA of 0.1 to 100 mA. |
| 3 | ANODE | passive | Anode terminal, the other current-carrying terminal of the shunt regulator, which must sink at least 40 µA typ (80 µA max) of cathode current for regulation. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ALJ |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |
## CAD (KiCad official)
- Symbol: `TL431D`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `tl431d-etched.step` / `tl431d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl431d.step` / `tl431d.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [ALJ datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603367603460972544) (9 pp, sha256 `20bc8649b08decae`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/tl431d-datasheet.pdf)