The X3S040000BF1H-Z with SMD Crystal Resonators 40MHz ±10ppm SMD-3225-4P RoHS is a surface mounted device (SMD) crystal resonator manufactured by Harmony. It has a frequency of 40MHz, with a tolerance of 10ppm, operating in the RoHS compliant environment. It has an SMD-style packaging, measuring 3225-4P. It is designed to be used in electronic devices such as oscillators, filters, or timing circuits. This part is perfect for a wide range of applications, from low-power devices to high-speed computing.