The following 4.7V zener device models are currently available in EasyEDA: 1. BZX384_C4V7 is a .model 2. BZX84_C4V7 is a .subckt 3. DI_BZT52C4V7 is a .subckt You just need to place the BZT52C10 symbol from the EasyEDA Libs and then change the name shown in the schematic to the new model and then, with the symbol still selected, type `I` and set the `Spice prefix` to `D` for a .model defined model or `X` for a .subckt defined model. Please see this post to see how to find and use them.: https://easyeda.com/forum/topic/How_to_find_out_what_spice_models_are_available_in_EasyEDA_-ACUO5nhXf You can also copy and paste your own model directly into your schematic as described in the relevant section of the EasyEDA Simulation eBook, referenced in the above post. :)