E1SCA18-7.3728M-TR is a surface mount quartz crystal resonator in HC49UP short package designed for precision frequency control applications. The device operates at a nominal frequency of 7.3728 MHz with frequency tolerance of ±50 ppm at 25°C and ±100 ppm over the temperature range of -40°C to +85°C, featuring an aging rate of ±5 ppm/year maximum. Key electrical characteristics include 18 pF parallel resonant load capacitance, 7 pF maximum shunt capacitance, 120 Ohms maximum equivalent series resistance, and AT-cut fundamental mode operation with a maximum drive level of 1 mW. The component is housed in a 3.2 mm height metal resistance weld sealed package with 2 pads for surface mount assembly, and is compliant with lead-free and RoHS standards. This crystal resonator is ideal for timing and frequency control in communication systems, industrial equipment, and consumer electronics requiring stable frequency references.