Intrinsically safe circuit arrangement designed to supply energy to a consumer with a maximum power demand (P Last), comprising: - a voltage source; - a voltage monitor connected to the voltage source, said monitor being designed to limit an output voltage to a maximum output voltage value, - a current limiting resistor connected to the voltage monitor, said resistor being designed to limit an output current (I Out) to a maximum output current value (I max); - a current limiting circuit connected between the voltage monitor and the current limiting resistor, said circuit being actively controlled and designed to limit the output current (I Out) to a current limitation value (I Lim), said current limiting circuit being designed in such a way to regulate at least the output current (I Out) to a current limitation value (I Lim) depending on a drop in voltage over at least one part of the current limiting circuit if a load on the circuit arrangement is greater than the nominal load, such that the current limitation value (I Lim) is adapted, preferably using a predefined characteristic, and the output current (I Out) is also adapted, wherein the current limiting circuit has at least a first shunt resistor, a transistor, a reference voltage source, an operation amplifier and a first control loop, wherein the transistor is switched in series with the first shunt resistor and the first control loop is formed over the transistor, and a voltage divider (4f, 4g) is in series with a first means, which only lets a current pass as of a certain voltage value, wherein an output of the operation amplifier is connected to a gate of the transistor, wherein the reference voltage source is arranged in front of the first shunt resistor and generates a reference voltage (URef), which is applied at a first input of the operation amplifier, wherein a partial voltage of the voltage divider of the first control loop is applied at a second input of the operation amplifier and the first control loop is designed in such a way that - in the event that a drop in voltage over the transistor exceeds the determined voltage value of the first means - a control current loop is set such that the current limiting circuit adapts the current limitation value via the partial voltage of the voltage divider. - a voltage source; - a voltage monitor connected to the voltage source, said monitor being designed to limit an output voltage to a maximum output voltage value, - a current limiting resistor connected to the voltage monitor, said resistor being designed to limit an output current (I Out) to a maximum output current value (I max); - a current limiting circuit connected between the voltage monitor and the current limiting resistor, said circuit being actively controlled and designed to limit the output current (I Out) to a current limitation value (I Lim), said current limiting circuit being designed in such a way to regulate at least the output current (I Out) to a current limitation value (I Lim) depending on a drop in voltage over at least one part of the current limiting circuit if a load on the circuit arrangement is greater than the nominal load, such that the current limitation value (I Lim) is adapted, preferably using a predefined characteristic, and the output current (I Out) is also adapted, wherein the current limiting circuit has at least a first shunt resistor, a transistor, a reference voltage source, an operation amplifier and a first control loop, wherein the transistor is switched in series with the first shunt resistor and the first control loop is formed over the transistor, and a voltage divider (4f, 4g) is in series with a first means, which only lets a current pass as of a certain voltage value,