Abstract: The invention relates to an exhaust gas aftertreatment device (1) of a motor vehicle, said device having a heater (2), which includes a plurality of heating elements (5, 6, 7), and a control unit (9) associated with the heater (2), wherein a common first switch (10) and in each case a second switch (32, 33, 34) are associated with the heating elements (5, 6, 7) and said heating elements (5, 6, 7) are jointly switchable by means of the first switch (10) and individually switchable by means of the second switches (32, 33, 34). The invention thereby provides that said first switch (10) is disposed separately from the control unit (9) and can be actuated by the same.

Abstract: A method is proposed for actuating an electromagnetic load (3) which can be switched between at least two switching states, particularly a magnetic valve, wherein switching between a first and a second of the switching states takes place as a result of a current flowing through the load (3) by means of applying an electrical voltage to said load (3). Provision is thereby made for the voltage to be clocked upon application thereof to said load (3) if due to the applied voltage the switching process would occur without clocking outside of a current ramp-up. The invention furthermore relates to an electrical circuit for actuating an electromagnetic load (3).