Rectifiers are a critical component in a circuit board that makes currents flow. A rectifier’s primary purpose is to convert the AC (alternating current) to DC (direct current) and then pass it to the core circuit of a system or device. Rectifiers generate a DC supply by rectifying either the positive or negative cycle, or by rectifying both of them. Rectifier anode references the direction in which the current flows, which depends on how users put them into the circuit.