The TC0331B from Tai-Saw Technology is a SAW Resonator with Frequency 868.275 to 868.425 MHz, Centre Frequency 868.35 MHz, Insertion Loss 1.5 to 2.5 dB, Capacitance 2.26 pF, Quality Factor Unloaded 9500. Tags: Surface Mount, SAW Resonator. More details for TC0331B can be seen below.