Circuit arrangement for protecting electrical loads in motor vehicles, has pyro-fuse controlled by voltage comparator connected to positive terminal of battery to protect electrical load against overvoltages of on-board system voltage

摘要

The circuit arrangement has a pyro-fuse (5) and a pyrotechnical switch element (7) for protection against polarity inversion of the battery (1). The pyro-fuse is controlled by a voltage comparator (9) connected to the positive terminal (12) of the battery to protect the electrical load (3) against overvoltages of the on-board system voltage.