The 49SAT27000221040 is an SMD Crystal Resonator manufactured by JGHC, rated for 27 MHz ±10ppm and RoHS compliance. This part is a two-pin crystal resonator, with an integrated case made of ceramic material. The dimensions are 4.2 mm × 2.6 mm × 0.9 mm. It has an equivalent series resistance of 70 Ohms maximum at 27 MHz and an aging rate of 0.5 ppm/year. It is designed for use in oscillator, filters and other circuits, and is suitable for surface-mount assembly.