The initial current Ic flowing in the thyristor is usually set to zero. So that the simulation is started with the thyristor blocked. However, you may specify an Ic value corresponding to a particular state of the circuit. In such a case all states of the linear circuit must be set accordingly. Initializing all-states of a power-electronic converter is a complex task. Therefore, this option is useful only with simple circuits.For applications where the thyristor is used in general purpose rectifier circuits fed by a voltage source at a frequency of 50 or 60 Hz, the typical parameters values specified in the dialog box can be used.