The TC0540A from Tai-Saw Technology is a SAW Resonator with Frequency 303.925 to 304.075 MHz, Centre Frequency 304 MHz, Insertion Loss 1.23 to 2 dB, Capacitance 4.5 pF, Voltage 5 V. Tags: Surface Mount, SAW Resonator. More details for TC0540A can be seen below.