The BUH51 has an application specific state–of–art die designed for use in 50 Watts Halogen electronic transformers. This power transistor is specifically designed to sustain the large inrush current during either the start–up conditions or under a short circuit across the load. This High voltage/High speed product exhibits the following main features:
Improved Efficiency Due to the Low Base Drive

Requirements:
— High and Flat DC Current Gain hFE
— Fast Switching
Robustness Thanks to the Technology Developed to Manufacture this Device
Motorola “6 SIGMA” Philosophy Providing Tight and Reproducible Parametric Distributions