formers (STs) as switches. The advanced devices have such operational qualities as high switching durability (up to several million cycles), an extremely high speed of performance (only several microseconds), absence of highly expensive and unreliable systems of forced switching, improved functional features, and convenience of combinability with microprocessor devices, which make them really competitive on the world market despite their high cost [3,4].These improved semiconductor apparatus (SA) of the DC, both contactless [5,6] and hybrid [7,8], have switching surges continuously caused by energy stored in the inductance of the circuit and the load at the time of switching. However, due to the fact that the circuits at switched off at a significant load almost instantly, the stored energy will be much higher, and dampening it will be much more difficult than in previously developed devices with the capacitive switching of the semiconductor switch where the switching capacitor combines its main function with the role of a voltage regulator [9].Therefore, it is expedient to research the methods of limiting switch surges in these devices and to make relevant calculations. The study is likely to be of indispensable interest to professionals working in the field of electromechanical engineering.

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