component
TL431CZ
Public Made by Adomby adom
STMicroelectronics Voltage Reference, TO-92. 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
markdownTL431CZ
STMicroelectronics · Voltage Reference · TO-92
TL431CZ from STMicroelectronics, in a TO-92. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Cathode | passive | Cathode (K) terminal of the shunt regulator diode; cathode-to-anode voltage range is Vref to 36 V with sink current capability of 1 to 100 mA. |
| 2 | Anode | passive | Anode (A) terminal of the shunt regulator diode, normally connected to circuit ground/return. |
| 3 | Ref | input | Reference (control) input to the internal error amplifier; reference input current is typically 1.8 µA (max 4-6.5 µA depending on grade) and reference input voltage is 2.5 V nominal, set externally between 2.5 V and 36 V with two resistors. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | TO-92 |
| Category | Power Management (PMIC) |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
TL431CZ - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files:
tl431cz-etched.step/tl431cz-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tl431cz.step/tl431cz.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (21 pp, sha256
2ad815e4b80d91e6, retrieved 2026-09-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).