BUY KRC404 https://www.utsource.net/itm/p/11275085.html
KRC404 NPN Bipolar Digital Transistor (BRT) 100mA/0.1A 47k 47k SOT-323/SC-70/USM marking ND switch interface circuit driver circuit
Description: NPN Silicon Epitaxial Planar Transistor Features: Low collector-emitter saturation voltage High current gain Low noise High switching speed High breakdown voltage Low collector-emitter leakage current High reliability Applications: Audio amplifiers High speed switching High voltage switching Low noise amplifiers Voltage regulators (For reference only)