Switch with power switching element protected against overload switches power switching element at least temporarily into safe state if threshold current exceeded in parallel branch

摘要

The device has main and control connection, a parallel branch(es) between the two main connections, a current source in the branch, whose output current depends on an applied voltage and that delivers a constant maximum current from a threshold voltage, and a coupling unit in series with the source connected to the control connection to switch the power switching element to a safe operating state if a threshold current is exceeded in the branch. The device has first and second main connections (11,12) and a control connection (13), at least one parallel branch (15) between the main connections, a current source (20) in the parallel branch, whose output current depends on an applied voltage and that delivers a constant maximum current from a threshold voltage, and a coupling unit (30) in series with the source connected to the control connection to switch the power switching element (10) at least temporarily into a safe operating state if a threshold current is exceeded in the parallel branch.