The TC0279A from Tai-Saw Technology is a SAW Resonator with Frequency 433.855 to 433.945 MHz, Centre Frequency 433.9 MHz, Insertion Loss 1.06 to 2 dB, Capacitance 3.922 pF, Voltage 12 V. Tags: Surface Mount, SAW Resonator. More details for TC0279A can be seen below.