.S1C40000UWJAC is an electronic part made by JYJE, intended for use in oscillator circuits. It has a 4MHz frequency, with a 15pF Capacitance, 120O Series Resistance, and tolerance of ±20ppm at -40? to +85?. It is a direct-insertion passive crystal, with an HC-49S-2P package, and is compliant with ROHS standards.