The S7D4.000000B20F30T with SMD Oscillators is a 4MHz quartz crystal based, surface mount oscillator package manufactured by SCTF. Operating at a frequency of 4MHz with a tolerance of ±20ppm, this XO (crystal oscillator) is compliant with RoHS directives. It is constructed in an SMD-7050-4P package, which offers both low ESR (Equivalent Series Resistance) and high Q (quality) factors, making it an ideal solution for a wide range of applications. This oscillator provides robust performance in temperature cycling and shock and vibration conditions. Additionally, this oscillator is 100% temperature cycle and shock tested; thus, ensuring that it is free from electrical and mechanical defects.