The Smoothing Inductors module consists of two chokes specially designed to smooth current variations occurring in thyristor (silicon-controlled rectifier or SCR) circuits. Each choke or inductor has two separate identical windings, terminated on the front panel by 4 mm safety banana jacks. Internal electrical components are identified on the module front panel. The inductors can be connected in series or parallel to show the effect of varying the inductance value on filtering. They can also be used as inductive loads in dc and ac circuits.