The ECS-250-20-3X-TR is a miniature low-profile resistance weld type SMD quartz crystal designed for compact electronic applications. It operates in fundamental mode with a frequency range of 12.000 to 40.000 MHz and features a load capacitance of 20 pF, with a maximum frequency tolerance of ±30 ppm at +25°C and frequency stability of ±50 ppm across the operating temperature range of -10°C to +70°C. The crystal exhibits a shunt capacitance of 7 pF maximum, a drive level of 100 µW maximum, and equivalent series resistance (ESR) that varies by frequency band (60 O max for 12–15.999 MHz, 50 O max for 16–29.999 MHz, and 40 O max for 30–40 MHz). This cost-effective, RoHS-compliant component reduces footprint by 50% compared to the CSM-7X package, making it ideal for space-constrained consumer electronics, telecommunications, and industrial timing applications.