Hongfa High Voltage DC relay (DC contactor) mainly adopts ceramic brazing seal structure, hydrogen-based protective gas, and utilizes the principle of magnetic blowing to extinguish the arc, which quickly solves the arc problem and realizes high voltage safe breaking. HVDC relays are mainly used for switching DC power supply and are widely used in new energy vehicles, charging piles, 48V DC start-stop systems, photovoltaic power generation, energy storage, industrial power supply and other fields.