BUY BBY40 https://www.utsource.net/itm/p/11285065.html
BBY40 Variable Capacitance Diodes (Varicaps, Varactors) 30V 26pF-32pF 5-6.5 SOT-23/SC-59 marking S2 UHF SHF tuning/High capacitance ratio/Excellent linearity
Manufacturer: NXP/Philips Package: SOT-23/SC-59 Description: NPN Silicon Planar Transistor Features: Low collector-emitter saturation voltage High current gain Low noise High switching speed Low collector-emitter leakage current High hFE Applications: General purpose switching and amplification Interface circuits Driver circuits High frequency oscillator circuits Low noise amplifier circuits (For reference only)