The TC0378A from Tai-Saw Technology is a SAW Resonator with Frequency 499.956 to 500.035 MHz, Centre Frequency 500 MHz, Insertion Loss 0.98 to 2 dB, Capacitance 4.35 pF, Voltage 5 V. Tags: Surface Mount, SAW Resonator. More details for TC0378A can be seen below.