Method for operating an electrical circuit and electrical circuit

Described herein is a method for operating an electrical circuit, wherein a modular switch (21) comprising four power semiconductor components and one capacitor is provided. With this method, either both the first and the second power semiconductor components (V1, V2) are switched so as to be conducting, and both the third and the fourth power semiconductor components (V3, V4) are controlled so as to be blocking, so that a current (i) flows from the first connection (24) across the first power semiconductor component, across the capacitor (C) and across the second power semiconductor component to the second connection (25), or both the third and fourth power semiconductor components (V3, V4) are switched so as to be conducting, and both the first and the second power semiconductor components (V1, V2) are controlled so as to be blocking, so that the current (i); flows in reverse direction from the second connection (25) across the fourth power semiconductor component, across the capacitor (C) and across the third power semiconductor component to the first connection (24).