The Murata CSTCE12M0G55-R0 is a quartz-based SMD ceramic resonator. It features an approximate resonant frequency of 12MHz, an approximate load capacitance of 18pF, and an operating temperature range of -40°C to +85°C. The equivalent ALT81-CSTNE12M0G550000R has a higher rated temperature range of -30°C to +85°C and a much longer life of up to 50 million thousand hours, as well as excellent thermal stability. It is suitable for high frequency clocks and other oscillator designs. The device is RoHS-compliant and Lead-Free.