Electromechanical switches, in other words relays or contactors, are often employed in order be able to switch electric power. As a rule, relays are inexpensive. Moreover, they stand out for their high switching capacity, low power loss and insensitivity with respect to brief overloads. However, due to their mechanical structure, which comprises movable armatures and movable normally open contacts, relays are prone to wear and tear. This is why electronic relays, in other words, semiconductor relays, are being used more and more often in applications that require a high switching frequency. Such electronic switches are also known as solid-state relays. Semiconductor relays are characterized by very little wear and tear, low sensitivity to vibration as well as a high switching frequency.