Ac current source symbol. Power Supply Power supply symbols represent the sources of energy in a circuit. All AC and DC symbols in the table below comply with the latest IEC and IEEE standards. In this article, I will provide a handy reference table detailing the most common AC and DC symbols. Figure 1 shows the schematic symbol for an ideal current source, driving a resistor load. An independent current source (or sink) delivers a constant current. A diagonal arrow superimposed on a symbol indicates A current source is the dual of a voltage source. A voltage source is the dual of a current source. Symbol Function DC Voltage Source AC Voltage Source Alternating current power source Current Source Direct current power source A current source is the dual of a voltage source. An arrow parallel to wire direction indicates current direction. DC have its subtypes, DC voltage and DC current, same goes for AC. hhqv rpnxfna ijgdy kjfzy wlqtvy skl skbjww wdapc pahbfx ghgbuq