The TC0631A from Tai-Saw Technology is a SAW Resonator with Frequency 304.225 to 304.375 MHz, Centre Frequency 304.3 MHz, Insertion Loss 1.48 to 1.8 dB, Capacitance 3.62 pF, Voltage 5 V. Tags: Surface Mount, SAW Resonator. More details for TC0631A can be seen below.