The TC0618A from Tai-Saw Technology is a SAW Resonator with Frequency 498.15 to 498.85 MHz, Centre Frequency 498.5 MHz, Insertion Loss 1.1 to 1.6 dB, Capacitance 2.47 pF, Voltage 5 V. Tags: Surface Mount, SAW Resonator. More details for TC0618A can be seen below.