Dielectric structure: Anode-Cathode. Semiconductor material: silicon. Function: SMD Zener Diode, 0.5W, 5%. Temperature: +175°C. Pd (Power Dissipation, Max): 0.5W. RoHS: yes. Assembly/installation: surface-mounted component (SMD). Housing: 12.7k Ohms. Housing (according to data sheet): SOD-80 ( 3.4x1.6mm ). Tolerance: 5%. Threshold voltage Vf (max): 1.5V. Forward voltage Vf (min): 1.5V. Zener voltage: 18V. Number of terminals: 2. Quantity per case: 1