The 9AC40665202040C3 is a 40.665 MHz 49S Crystals 20 pF 40O ±20 ppm -40?~+85? HC-49S-2P Crystals ROHS manufactured by JGHC that is designed to provide a reliable and accurate source of frequency for your applications. It is a high-stability crystal oscillator, with an accuracy of ±20 ppm over a temperature range of -40?~+85?, and its RoHS compliance ensures that it will meet the latest restrictions on the use of hazardous substances. This crystal oscillator is designed with two metal dome electrodes, with a frequency range of 40.665MHz, a capacitance of 20pF, and a load capacitance of 40O. It can be used in a wide range of electronic and other applications requiring a stable clock source.