The TC0437A from Tai-Saw Technology is a SAW Resonator with Frequency 314.925 to 315.075 MHz, Centre Frequency 315 MHz, Insertion Loss 1.36 to 2 dB, Capacitance 4.25 pF, Voltage 5 V. Tags: Surface Mount, SAW Resonator. More details for TC0437A can be seen below.