current flowing through the load a power transistor connected in series to the load which is triggered in dependence upon the current flowing through the load and a further transistor arranged in parallel to the power transistor the device has the advantage of reducing the power dissipation in the power transistor application_number US 57183695 A description in the exemplary embodiment the load is the coil of a solenoid valve which influences the metering of fuel into an internal combustion engine by applying activation signals to this solenoid valve the beginning of injection the end of injection and thus also the injected fuel quantity can be controlled for this purpose the solenoid valve must open and or close at a defined instant furthermore the solenoid valve must reach its new end position as quickly as possible after the driving signal is output fig1 schematically depicts the elements of an embodiment of a device according to the present invention an electromagnetic load 100 is coupled at its first terminal to a battery voltage and at its second terminal to a control means 110 the control means 110 is preferably a transistor in particular a field effect transistor here the second connection of the load is linked to the drain connection of the field effect transistor 110 the source connection of the transistor 110 communicates with a current measuring means 120 for detecting the current flowing through the load the second connection of the current measuring means 120 is connected to ground the configuration of these three elements is merely shown for illustrative.