The ECS-250-20-30B-DU is a miniature SMD crystal oscillator designed for communication and test equipment applications. It features a compact 5.0 × 3.2 × 0.85 mm ceramic package with fundamental mode oscillation, supporting frequencies from 10.000 to 50.000 MHz with a load capacitance of 20 pF. The device delivers frequency tolerance of ±30 ppm at +25°C and frequency stability of ±100 ppm across the operating temperature range of -55 to +125°C, with a maximum shunt capacitance of 5 pF and drive level of 300 µW. The crystal is RoHS compliant and Pb-free, making it suitable for modern electronic designs requiring reliable timing references in compact form factors.