The 7U20000E18UCG with SMD Crystal Resonators SMD-3225_4P RoHS is a surface mount device (SMD) quartz crystal resonator manufactured by SJK. It is a four-pin component designed for strong stability at frequencies up to 20MHz. It features RoHS compliance, which indicates that it meets the EU's Restriction of Hazardous Substances (RoHS) Directive, which sets limits for the amount of hazardous substances used in electronic products. This resonator is also AEC-Q200 Compliant, meaning it can be used in the automotive industry for a wide variety of applications.