The TC0157A from Tai-Saw Technology is a SAW Resonator with Frequency 433.845 to 433.995 MHz, Centre Frequency 433.92 MHz, Insertion Loss 1.2 to 2 dB, Capacitance 3.2 pF, Quality Factor Unloaded 14500. Tags: Drop In, SAW Resonator. More details for TC0157A can be seen below.