The TC0513A from Tai-Saw Technology is a SAW Resonator with Frequency 491.805 to 491.865 MHz, Centre Frequency 491.835 MHz, Insertion Loss 1.1 to 2 dB, Capacitance 4.16 pF, Voltage 5 V. Tags: Surface Mount, SAW Resonator. More details for TC0513A can be seen below.