# BC557B (Component) ## Description Bipolar Transistors - BJT BC557B TO-92-3_L4.9-W3.7-P1.27-L LCSC Part Number: C713617 JLCPCB Part Class: Extended Part Manufactured by LGE(鲁光) ## Component Details - **Owner:** lcsc - **Created:** 10/31/2024 - **Last Updated:** 4/21/2025 - **Visibility:** Public - **Part Type:** Bipolar Transistors - BJT - **Datasheet URL:** https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_LGE-BC557B_C713617.pdf - **LCSC Part Number:** C713617 - **Package or Case Code:** TO-92-3_L4.9-W3.7-P1.27-L - **JLCPCB Part Class:** Extended Part - **Manufacturer Part Number:** BC557B - **Manufacturer Name:** LGE(鲁光) - **Product Info Url:** https://lcsc.com/product-detail/Transistors-NPN-PNP_LGE-BC557B_C713617.html - **Used in:** 11 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/bc557b/diotec-semiconductor-ag?utm_currency=USD&region=europe) | $0.1032 | 1.4K | | [Digi-Key](https://www.digikey.com/en/products/detail/rochester-electronics-llc/BC557B/11543823) | N/A | N/A | | [LCSC](https://www.lcsc.com/product-detail/C3201606.html) | $0.0814 | 0 | | [Mouser](https://www.mouser.com/ProductDetail/NXP-Semiconductors/BC557B?qs=84A%2FDAdkstKcMLBdkqdh9Q%3D%3D) | $0.12 | 12K | | [TME](https://www.tme.com/us/en-us/katalog/?queryPhrase=BC557B-LGE) | $0.17 | 4K | | [Verical](https://www.verical.com/pd/diotec-semiconductor-ag-bjt---general-purpose-BC557B-855655) | N/A | N/A | - **Part Type:** Transistors - **Sub-Type:** BJT - **Manufacturer:** LGE - **MPN:** BC557B - **Mount Type:** PCB - **Package / Case Code:** 92-TO - **Pin Count:** 3 ## Pins | Pin | Name | Type | |-----|------|------| | 1 | C | | | 2 | B | | | 3 | E | | --- *Generated from [https://www.flux.ai/lcsc/bc557b](https://www.flux.ai/lcsc/bc557b)*