The TC0318A from Tai-Saw Technology is a SAW Resonator with Frequency 433.845 to 433.995 MHz, Centre Frequency 433.92 MHz, Insertion Loss 1.6 to 2.5 dB, Capacitance 2.63 pF, Voltage 12 V. Tags: Surface Mount, SAW Resonator. More details for TC0318A can be seen below.