BUY 2SC4051 https://www.utsource.net/itm/p/300980.html
Switching Power Transistor3A NPN
Description: 2SC4051 is a NPN silicon epitaxial transistor designed for high-frequency power amplification. Features: High breakdown voltage High transition frequency Low collector-emitter saturation voltage High gain Applications: Audio power amplifiers High-frequency power amplifiers Switching power supplies (For reference only)