Dielectric structure: unidirectional. Semiconductor material: silicon. Function: transil diode, overvoltage protection. Number of terminals: 2. Pd (Power Dissipation, Max): 5W, max 600W 1ms. RoHS: yes. Assembly/installation: PCB through-hole mounting. Housing: DO-15. Housing (according to data sheet): DO-15 ( 3.2x7.2mm )