# ULN2803A (Component)
## Description
Bipolar (BJT) Transistor Array 8 NPN Darlington 50V 500mA - 2.25W Through Hole 18-DIP #CommonPartsLibrary #TransistorsArrays #ULN2803
## Component Details
- **Owner:** jecstronic
- **Created:** 3/10/2022
- **Last Updated:** 7/29/2023
- **Visibility:** Public
- **Datasheet URL:** https://www.st.com/content/ccc/resource/technical/document/datasheet/e4/fa/1c/16/4e/39/49/04/CD00000179.pdf/files/CD00000179.pdf/jcr:content/translations/en.CD00000179.pdf
- **Part Type:** Transistor Array
- **Manufacturer Part Number:** ULN2803A
- **License:** https://creativecommons.org/licenses/by/4.0/
- **Manufacturer Name:** STMicroelectronics
- **Used in:** 63 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 |
|------------|--------------------|-------|
| [Arrow](https://www.arrow.com/en/products/uln2803a/stmicroelectronics.html?utm_currency=USD®ion=europe) | $1.0246 | 742K |
| [Digi-Key](https://www.digikey.com/en/products/detail/umw/ULN2803A/16705954) | $1.10 | 0 |
| [LCSC](https://www.lcsc.com/product-detail/C33962542.html) | $0.1545 | 2.7K |
| [Mouser](https://www.mouser.com/ProductDetail/STMicroelectronics/ULN2803A?qs=FOlmdCx%252BAA1lVc%2FYEXA4pg%3D%3D) | $1.68 | 33K |
| [TME](https://www.tme.com/us/en-us/katalog/?queryPhrase=ULN2803A) | $1.51 | 1K |
| [Verical](https://www.verical.com/pd/stmicroelectronics-bjt---darlington-ULN2803A-117279?utm_currency=USD) | N/A | N/A |
- **Part Type:** Transistors
- **Sub-Type:** NPN
- **Manufacturer:** STMicroelectronics
- **MPN:** ULN2803A
- **Mount Type:** Through Hole
- **Package / Case Code:** 18-DIP
- **Pin Count:** 18
## Pins
| Pin | Name | Type |
|-----|------|------|
| 1 | I1 | |
| 2 | I2 | |
| 3 | I3 | |
| 4 | I4 | |
| 5 | I5 | |
| 6 | I6 | |
| 7 | I7 | |
| 8 | I8 | |
| 9 | GND | |
| 10 | COM | |
| 11 | O8 | |
| 12 | O7 | |
| 13 | O6 | |
| 14 | O5 | |
| 15 | O4 | |
| 16 | O3 | |
| 17 | O2 | |
| 18 | O1 | |
---
*Generated from [https://www.flux.ai/jecstronic/uln2803a](https://www.flux.ai/jecstronic/uln2803a)*