A switching circuit is suggested for controlling the current through an electrical consumer, in particular an electromagnetic consumer (10), whereby a field effect transistor (11) is used as a control and current measuring member being series connected to the consumer. The field effect transistor is brought into the conductive condition with the assistance of a controlling device, such as an operational amplifier which in turn is immediately controlled by switching-on enforcing means when the field effect transistor is short-circuited with respect to a power source. The switching-on enforcing means comprise a capacitor, for example.