This application discloses a direct current combiner box, an inverter, a photovoltaic system, and a protection method. The combiner box includes a switching device, a sampling circuit, and a controller. The switching device is connected in parallel between...

Provided is a protection device of an electronic device to which a first switch includes an input terminal connected to a positive or negative wiring, a first output terminal connected to a first node, and a second output terminal connected to a second nod...

There is described a device for protecting electrically powered units (195, 695, 795, 895) against a reverse application of a power supply (190, 790, 890). The described device comprises a first input terminal (102, 202, 302, 402, 502, 602, 702, 802) adapt...

A switch control circuit for a power supply and a power supplying circuit are provided. The switch control circuit includes: a cathode of a diode is connected with a negative electrode of the power supply, an anode of the diode is connected with a first te...

A switching device (10) has a main IGFET (11) having a Schottky barrier diode D3 for blocking an inverse current built therein, a protective switch means (12), and a protective switch control means (13). The protective switch means (12) is connected in bet...