BFP640 Surface mount high linearity silicon NPN RF.
BFP640 - Surface mount high linearity silicon NPN RF bipolar transistor
BFP640F - NPN Silicon Germanium RF Transistor
BFP640ESD - Robust Low Noise Silicon Germanium Bipolar RF Transistor
BFP640FESD - Robust Low Noise Silicon Germanium Bipolar RF Transistor