The ZAC1203 is a surface-mount device (SMD) Z-axis air coil designed for RFID applications, particularly in automotive systems such as Passive Keyless Entry (PKE) and Keyless Go. Operating at 125 kHz, it offers inductance values ranging from 2.38 mH to 6.38 mH, depending on the specific model. The coil features a low-profile design with dimensions of 14.3 mm x 12 mm x 2.5 mm, making it suitable for compact spaces. It provides high sensitivity and stable performance across a temperature range of -40°C to +125°C, ensuring reliability in various environmental conditions.