The ACTR315.5/315.50/TO39 from Advanced Crystal Technology is a SAW Resonator with Frequency 315.425 to 315.575 MHz, Centre Frequency 315.5 MHz, Insertion Loss 1.2 to 1.8 dB, Capacitance 2.4 to 3 pF, Quality Factor Loaded 1900. Tags: Drop In, SAW Resonator. More details for ACTR315.5/315.50/TO39 can be seen below.