The TC0409A from Tai-Saw Technology is a SAW Resonator with Frequency 433.670 to 434.170 MHz, Centre Frequency 433.92 MHz, Insertion Loss 1.75 to 2.5 dB, Capacitance 3.84 pF, Voltage 12 V. Tags: Surface Mount, SAW Resonator. More details for TC0409A can be seen below.