ABM12W-40.0000MHZ-7-D1X-T3 is an IoT-optimized low-profile quartz crystal designed for energy-saving wearables and wireless applications. Operating at a fundamental frequency of 40.0000 MHz with a 7 pF load capacitance, this crystal delivers exceptional performance with equivalent series resistance (ESR) of 22.99 O typical at 6 pF plating load and maximum 80 O over the operating temperature range. The device features a compact 1.6 × 1.2 × 0.4 mm form factor with seam-sealed construction for long-term reliability, operating across a temperature range of -40°C to +125°C with frequency stability of ±10 ppm. This crystal is ideal for Bluetooth/BLE modules, wireless connectivity, ultra-low power microcontrollers, and NFC applications where space constraints and power efficiency are critical design requirements.