Dielectric structure: unidirectional. Semiconductor material: silicon. Function: protection against overvoltage. IFSM: 200A. Breakdown voltage: 220V. Pd (Power Dissipation, Max): 1500W. Spec info: transient suppressor. Assembly/installation: PCB through-hole mounting. Housing: DO-201. Housing (according to data sheet): DO-201 ( 9.0x5.0mm ). Operating temperature: -50...+175°C. Threshold voltage Vf (max): 5V. Forward voltage Vf (min): 3.5V