The S3B12.000000F1210F30 is a SMD Crystal Resonator SMD-3225-4P RoHS manufactured by SCTF. It is a high-frequency Crystal Resonator assembly with an insulated base plate, quartz crystal and an epoxy dome top. The crystal is securely held in the insulated base, and the epoxy top is designed to help dissipate heat, providing better stability over a wider temperature range. The crystal has a frequency of 12MHz +/-30ppm and is rated at 8pF capacitance. It has a 4-pin SMD-3225 configuration, and is compliant to RoHS standards.