The ECS-286.3-10-37-JTN-TR from ECS Inc. International is a RF Quartz Crystal with Frequency 28.63636 MHz, Frequency Stability ±20 ppm, Frequency Tolerance ±20 ppm, Load Capacitance 10 pF, Equivalent Series Resistance 60. Tags: Surface Mount. More details for ECS-286.3-10-37-JTN-TR can be seen below.