The TC0504A from Tai-Saw Technology is a SAW Resonator with Frequency 445.925 to 446.075 MHz, Centre Frequency 446 MHz, Insertion Loss 1.35 to 2 dB, Capacitance 3.36 pF, Voltage 5 V. Tags: Surface Mount, SAW Resonator. More details for TC0504A can be seen below.