The SI4953ADY-T1-E3 is a Low-Gain Hyperabrupt Tuning Varactor Diode from Vishay. It is designed for use in communication systems, voltage-controlled oscillator (VCO) applications, and other RF circuits. It features low-gains for high Q applications, wide-range temperature stability, low series resistance, and low parasitic capacitance. The device has a soft annealing process ensures high Q, small shrinkage, and total harmonic distortion (THD) reduction. The SI4953ADY-T1-E3 is available in a typical case size of SOT-23-3 and is RoHS compliant.