The schematic symbol for a Silicon Controlled Rectifier (SCR) is similar to that of a diode with an added gate terminal.
SCR Symbol Breakdown
The SCR symbol visually represents its functionality and components:
- Anode: Represents the positive terminal.
- Cathode: Represents the negative terminal.
- Gate: The control terminal. Current applied to the gate triggers the SCR to conduct between the cathode and anode.
This is supported by Figure 12.21 in the reference material, which shows that "The schematic symbol for an SCR is similar to that of a diode with a cathode and an anode." Also it mentions that "the third element of the SCR is known as the gate". The SCR conducts when current is applied to the gate, allowing current flow between the cathode and anode.
