# BD139 (Component) ## Description Bipolar (BJT) Transistor NPN - Through Hole TO-126-3 Vertical #CommonPartsLibrary #TransistorBJT #BD139 ## Component Details - **Owner:** jecstronic - **Created:** 11/11/2021 - **Last Updated:** 8/25/2023 - **Visibility:** Public - **Datasheet URL:** http://www.st.com/content/ccc/resource/technical/document/datasheet/25/1f/cf/0d/03/ad/4e/06/CD00001225.pdf/files/CD00001225.pdf/jcr:content/translations/en.CD00001225.pdf - **Manufacturer Part Number:** BD139 - **Part Type:** Transistor - **License:** https://creativecommons.org/licenses/by/4.0/ - **Manufacturer Name:** STMicroelectronics - **Used in:** 91 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/bd139/stmicroelectronics.html?utm_currency=USD&region=nac) | $0.079 | 667K | | [Digi-Key](https://www.digikey.com/en/products/detail/stmicroelectronics/BD139/1037682) | $0.67 | 6K | | [HQonline](https://www.hqonline.com/product-detail/general-purpose-transistors-st-bd139-2500269853) | N/A | N/A | | [LCSC](https://www.lcsc.com/product-detail/C27866.html) | N/A | N/A | | [Mouser](https://www.mouser.com/ProductDetail/onsemi/BD139?qs=vNc2DXHODiI0%252BZZC8g2wVg%3D%3D) | $0.67 | 2.4K | | [TME](https://www.tme.com/us/en-us/katalog/?queryPhrase=BD139) | $0.594 | 2.1K | | [Verical](https://www.verical.com/pd/stmicroelectronics-bjt---general-purpose-BD139-128294?utm_currency=USD) | N/A | N/A | - **Part Type:** Transistors - **Sub-Type:** NPN - **Manufacturer:** STMicroelectronics - **MPN:** BD139 - **Mount Type:** Through Hole - **Package / Case Code:** TO - **Pin Count:** 3 ## Pins | Pin | Name | Type | |-----|------|------| | 1 | E | | | 2 | C | | | 3 | B | | --- *Generated from [https://www.flux.ai/jecstronic/bd139~drp](https://www.flux.ai/jecstronic/bd139~drp)*