The ECS-120-8-30Q-VY-TR from ECS Inc. International is a RF Quartz Crystal with Frequency 12 MHz, Frequency Stability ±150 ppm, Frequency Tolerance ±30 ppm, Load Capacitance 8 pF, Equivalent Series Resistance 60. Tags: Surface Mount. More details for ECS-120-8-30Q-VY-TR can be seen below.