Power semiconductor protecting device

The invention relates to a power semiconductor protecting device (1) comprising a current meter (UR), a voltage meter (USW) and a switch (SW), the current meter (UR) measures a current (I) passing through the device (1), the switch (SW) is used for interrupting current through-flow passing through the device (1), the voltage meter (USW) measures a voltage of the switch (SW) in the switch-on state, wherein if the current meter (UR) measures a current (I) exceeding a first current threshold (Iref) the switch (SW) is controlled for a predetermined time (taus) such that the current through-flow is interrupted, the voltage of the switched-on switch (SW) is measured in the predetermined time by means of the voltage meter (USW), recognition of short circuit is realized in the event of repeated switching by means of the voltage (USW) of the switched-on switch (SW), and the switch (SW) is permanently activated so that the current through-flow is interrupted. 本发明的说明内容是种功率半导体保护装置（1），具有电流计（U）、电压计（U）和开关（SW），其中，所述电流计（U）测量通