The TC0231A from Tai-Saw Technology is a SAW Resonator with Frequency 315.4 to 315.6 MHz, Centre Frequency 315.5 MHz, Insertion Loss 0.8 to 2 dB, Capacitance 4.69 pF, Voltage 12 V. Tags: Drop In, SAW Resonator. More details for TC0231A can be seen below.