The ECS-120-10-36Q-ES-TR is a miniature SMD crystal oscillator based on the ECX-2236Q package, designed for precision frequency control applications. It features a compact 2.5 x 2.0 mm footprint with a low profile of 0.5 mm, supporting fundamental mode oscillation across a frequency range of 12.000 to 60.000 MHz. The device is specified with a frequency tolerance of ±30 ppm at +25°C and frequency stability of ±50 ppm over the extended temperature range of -40°C to +125°C (ES option), with a typical load capacitance of 8 pF and shunt capacitance maximum of 5 pF. Equivalent series resistance (ESR) varies by frequency, ranging from 150 O at 12–15.999 MHz down to 40 O at 35–60 MHz, with drive level between 10 and 100 µW. The crystal is RoHS compliant and AEC-Q200 qualified, making it suitable for automotive, industrial, and consumer electronics applications requiring reliable timing in compact form factors.