4 MHz HC-49S Low-Profile Quartz Crystal (Arduino, Raspberry Pi)

This HC-49S quartz crystal resonator is a fundamental component for clock generation in electronics projects (Arduino, Raspberry Pi, custom circuits). Operating at a nominal frequency of 4 MHz, it provides a frequency stability of ±20 ppm and functions within a temperature range of -20°C to +70°C (extendable to +85°C). The low-profile HC-49S package is designed for easy integration on dense PCBs, featuring a typical load capacitance of 12 pF or 20 pF and a maximum Equivalent Series Resistance (ESR) of 120 Ω at this frequency.