The BZX84C18_R1_00001 with Zener Diodes by Panjit is a Surface-Mount Technology (SMT) Zener diode with a voltage rating of 3K, featuring a dual-in-line, or “DIP”, package. It is designed to protect against short-circuit in power supply applications, primarily in car stereos, digital clocks, electronic games, and battery-operated toys. It has a standard operating temperature range of -65°C to 150°C, and maximum power dissipation of 100mW. The device is RoHS compliant, meaning that it is free of hazardous materials, including lead and halogen.