2sc6145a.pdf datasheet:

2SC6145AAudio Amplification TransistorFeatures and Benefits Description LAPT (High frequency multi emitter transistor) Sanken LAPT transistors have an innovative design, produced Small package (TO-3P) by adapting advancements in the unique Sanken thin-wafer High power handling capacity, 160 W production technology. These NPN power transistors achieve Improved sound output by reduced on-chip impedance faster power-up by decreasing thermal resistance, and provide Complementary to 2SA2223A a higher avalanche breakdown voltage rating. The high power-handling capacity of the TO-3P package allows a smaller footprint on the circuit board layout. This series of transistors is very well suited not only for multichannel applications for AV (audio-visual) amplifiers and receivers, but also for parallel connection applications for PA (professional audio