The ECS-200-20-4X is a low-profile resistance weld type through-hole quartz crystal based on the HC-49USX package, operating at 20.000 MHz with a 20 pF load capacitance. It features a frequency tolerance of ±30 ppm at +25°C and frequency stability of ±50 ppm over the operating temperature range of -10°C to +70°C, with a maximum equivalent series resistance (ESR) of 30 O in fundamental mode. The crystal has a shunt capacitance of 7 pF maximum, a drive level of 500 µW, and dimensions of 11.35 mm × 10.5 mm with a height of 3.5 mm, making it suitable for compact PCB designs. This RoHS-compliant, lead-free device is cost-effective and ideal for timing applications in consumer electronics, telecommunications, and industrial equipment requiring reliable frequency reference with minimal board space.