# TL431 (Component)

## Description

TL431 is a KEC programmable precision shunt voltage regulator with an adjustable reference from about 2\.5 V up to 36 V, commonly used for voltage regulation, monitoring, and feedback circuits, supplied in a TO\-92 package\.

Keywords: TL431, KEC TL431, shunt regulator, adjustable voltage reference, TO\-92

## Component Details

- **Owner:** silicon\-yard
- **Created:** 8/25/2026
- **Last Updated:** 8/25/2026
- **Visibility:** Public
- **Manufacturer Part Number:** TL431
- **Part Type:** Transistors
- **Datasheet URL:** https://4donline\.ihs\.com/images/VipMasterIC/IC/KECC/KECCS05169/KECCS05169\-1\.pdf?hkey=EF798316E3902B6ED9A73243A3159BB0
- **Manufacturer Name:** KEC
- **Used in:** 5 projects

## Distributor Pricing (qty 1)

*Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.*

| Distributor | Unit Price (qty 1) | Stock |
|------------|--------------------|-------|
| [Digi\-Key](https://www.digikey.com/en/products/detail/shenzhen-slkormicro-semicon-co-ltd/TL431/25701278) | $0\.23 | 2\.9K |
| [HQonline](https://www.hqonline.com/product-detail/voltage-reference-mdd-tl431-2500351111) | $0\.02257 | 0 |
| [LCSC](https://www.lcsc.com/product-detail/C5310941.html) | N/A | N/A |

- **Part Type:** Transistors
- **Sub-Type:** Other
- **MPN:** TL431
- **Package / Case Code:** 92\-TO
- **Pin Count:** 3
## Pins

| Pin | Name | Type |
|-----|------|------|
| 1 | REF | Unspecified |
| 2 | A | Unspecified |
| 3 | K | Unspecified |

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*Generated from [https://flux\.ai/silicon\-yard/tl431\-5yekr\~oz](https://flux.ai/silicon-yard/tl431-5yekr~oz)*