Switching device of a power circuit comprising: - two switching terminals ; - a high-voltage depletion mode transistor and a low-voltage enhancement mode transistor arranged in series between the two switching terminals ; the device being characterized in that it comprises: - a control circuit having a first input for receiving a switching signal and a second input for receiving an activation signal from the device , the control circuit being designed to put the switching device : ▪ in an inactive state when the activation signal has a first level, in which the low-voltage transistor and the high-voltage transistor are each turned off; ▪ and in an active state when the activation signal has a second level, which is different from the first, in which the low-voltage transistor is turned on and the switching signal applied to the gate of the high-voltage transistor ; - a driver circuit for applying the switching signal to the gate of the high-voltage transistor , the driver circuit being supplied with a first voltage from a first voltage source (VDR+) and with a second voltage from a second voltage source (VDR-), the first and the second voltage being higher and lower, respectively, than the threshold voltage of the high-voltage transistor ; - at least one programming module (15, 15a, 15'a, 15b, 15'b) associated with the driver circuit , said module being designed to allow programming of the incoming current (I + ) intended to be injected into the gate of the high-voltage transistor , and of the outgoing current (I - ) intended to be drawn from said gate; it being possible for the programming module to be connected to a first and a second passive component for programming the incoming current (I + ) and the outgoing current (I - ), respectively. - two switching terminals ; - a high-voltage depletion mode transistor and a low-voltage enhancement mode transistor arranged in series between the two switching terminals ; - a control circuit having a first input for receiving a switching signal and a second input for receiving an activation signal from the device , the control circuit being designed to put the switching device : ▪ in an inactive state when the activation signal has a first level, in which the low-voltage transistor and the high-voltage transistor are each turned off; ▪ and in an active state when the activation signal has a second level, which is different from the first, in which the low-voltage transistor is turned on and the switching signal applied to the gate of the high-voltage transistor ; ▪ in an inactive state when the activation signal has a first level, in which the low-voltage transistor and the high-voltage transistor are each turned off; ▪ and in an active state when the activation signal has a second level, which is different from the first, in which the low-voltage transistor is turned on and the switching signal applied to the gate of the high-voltage transistor ; - a driver circuit for applying the switching signal to the gate of the high-voltage transistor , the driver circuit being supplied with a first voltage from a first voltage source (VDR+) and with a second voltage from a second voltage source (VDR-), the first and the second voltage being higher and lower, respectively, than the threshold voltage of the high-voltage transistor ; - at least one programming module (15, 15a, 15'a, 15b, 15'b) associated with the driver circuit , said module being designed to allow programming of the incoming current (I + ) intended to be injected into the gate of the high-voltage transistor , and of the outgoing current (I - ) intended to be drawn from said gate; it being possible for the programming module to be connected to a first and a second passive component for programming the incoming current (I + ) and the outgoing current (I - ), respectively. <EOS>