component
TL431BFDT
Public Made by Adomby adom
Nexperia Voltage Reference, 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
markdownTL431BFDT
Nexperia · Voltage Reference · SOT-23
TL431BFDT from Nexperia, 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 | K | passive | Cathode of the shunt regulator; recommended operating cathode current IK is 1 mA to 100 mA with cathode-anode voltage VKA up to Vref to 36 V. |
| 2 | REF | input | Reference input, Vref typically 2.495 V (2.440 V to 2.550 V for the 2.0 % grade; 2.483 V to 2.507 V for the B-grade), with reference current Iref limited to -0.05 mA to 10 mA. |
| 3 | A | passive | Anode of the shunt regulator, forming the other terminal of the cathode-anode path; cathode-anode voltage VKA is rated up to 36 V in recommended operation (37 V absolute maximum). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
TL431BFDT - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
tl431bfdt-etched.step/tl431bfdt-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431bfdt.step/tl431bfdt.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (19 pp, sha256
4418d6a27f332797, 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).