FA-23816.0000MB-K3 is a MHz-range crystal unit designed for clock and RF reference applications in mobile phones, Bluetooth, W-LAN, and ISM band radio systems. The unit operates with a fundamental overtone order and is available in multiple package variants (FA-238V, FA-238, TSX-3225) with external dimensions of 3.2 × 2.5 mm and heights ranging from 0.6 to 0.7 mm. It features a frequency range of 12 MHz to 50 MHz, storage temperature range of -40°C to +125°C, and operating temperature range of -40°C to +85°C (with +105°C option available). The crystal unit is RoHS compliant and lead-free, making it suitable for modern electronic applications requiring precise frequency stability and low power consumption in portable and wireless communication devices.