## Summary of the Document:

This document is a datasheet for the STMicroelectronics BUX48 and BUX48A NPN power transistors. Here’s a breakdown of the key information:

Key Features & Applications:

️· Type: NPN Power Transistor
️· Intended Use: Designed for switching and amplifier applications. Suitable for inductive loads.
️· Package: TO-3 Package
️· ECOPACK: Available in lead-free ECOPACK packaging, meeting environmental requirements.

Key Electrical Characteristics:

️· Collector Current (IC): Up to 15A (varies slightly between BUX48 and BUX48A).
️· Collector-Emitter Voltage (VCE): Up to 300V
️· Power Dissipation: Not explicitly stated, but designed for moderate to high power applications.
️· Saturation Voltages: Detailed saturation voltages (VCE(sat), VBE(sat)) are provided for various current levels.
️· Switching Speeds: Switching times (ton, ts, tf) are specified for both resistive and inductive loads.

Other Notable Information:

️· Test Circuits: Provides test circuit diagrams for both resistive and inductive load switching.
️· Package Dimensions: Detailed TO-3 package mechanical drawings are included.
️· Revision History: Document version and change log are provided.
️· Disclaimer: Standard legal disclaimers regarding product use and warranty.



In essence, this datasheet provides engineers with the necessary technical specifications and performance characteristics to properly implement the BUX48/BUX48A transistors in their designs.