ABM12W-27.0000MHZ-7-B1U-T3 is an IoT-optimized low-profile quartz crystal designed for energy-saving wearables and wireless applications. The device operates at a fundamental frequency of 27.0000 MHz with a load capacitance of 7 pF, featuring an exceptionally compact form factor of 1.6 × 1.2 × 0.4 mm that is ideally suited for height-constrained designs. It delivers frequency tolerance of ±10 ppm at +25°C with frequency stability of ±10 ppm over the operating temperature range of -40°C to +125°C, and provides equivalent series resistance (ESR) of 80 O maximum over the operating temperature range. The crystal is seam-sealed for long-term reliability and is RoHS/RoHS II compliant. Common applications include Bluetooth/BLE modules, wireless IoT devices, ultra-low power microcontrollers, NFC systems, and ISM band communications where compact size and low power consumption are essential.