The TC0253A from Tai-Saw Technology is a SAW Resonator with Frequency 303.525 to 303.675 MHz, Centre Frequency 303.6 MHz, Insertion Loss 1.5 to 2.5 dB, Capacitance 4.586 pF, Quality Factor Unloaded 6000. Tags: Surface Mount, SAW Resonator. More details for TC0253A can be seen below.