The TC0307A from Tai-Saw Technology is a SAW Resonator with Frequency 621.987 to 622.049 MHz, Centre Frequency 622.018 MHz, Insertion Loss 1.2 to 2 dB, Capacitance 2.86 pF, Voltage 12 V. Tags: Surface Mount, SAW Resonator. More details for TC0307A can be seen below.