The S3B27.000000F1210F30 with SMD Crystal Resonators SMD-3225-4P RoHS manufactured by SCTF is a surface mount, 4-pin crystal oscillator. It is a 3225 (3x2.5mm) size quartz Crystal Resonator delivering a frequency range of 12.0 ~ 13.0 MHz in the crystal frequency adjustment range of -25 ~ +20°C. With an operating temperature of -55 °C ~ +85°C, and a peak reflow temperature of +230°C during 10secs, it offers a very good RFI and ESD shielding performance. With a high ESR value of 150KHz, it provides a better signal integrity. It is also RoHS compliant, making it a very reliable and efficient electronic part.