If you are building an uncontrolled rectifier, the power diodes are available in eSim. You need to add library as powerdioide.lib.

But, if you want to build a 3-phase Ac source, you can build a sub-circuit of the same.

Please follow the instructions on "How to build a subcircuit" in eSim manual. Once you create a sub-circuit, you can use it in your circuit.

Sorry for the delayed reply.

Regards,

Gloria N