Question

What is the thyristor SCR symbol?

Answer 1

The symbol for a Thyristor SCR (Silicon Controlled Rectifier) typically looks like this:

- **Three terminals**: Anode (A), Cathode (K), and Gate (G).
- **A diode-like symbol** with an arrow pointing from the Anode to the Cathode.
- **A small line** (gate) connecting to the Anode-Cathode junction.

Here’s a simple representation:

```
     A
     |
     |
     |
     |----->| (Cathode)
     |
     |
     |
     G
```

- The **arrow** represents the direction of conventional current flow when the SCR is conducting.
- The **gate** terminal controls the SCR's switching.

This symbol indicates that the SCR allows current to flow from the anode to the cathode when a gate signal is applied.

Answer 2

The symbol for a Silicon-Controlled Rectifier (SCR), which is a type of thyristor, is similar to the diode symbol but with an additional gate terminal. Here’s a detailed description:

- **Anode (A):** The positive terminal, represented by the arrow pointing outwards, similar to a diode.
- **Cathode (K):** The negative terminal, represented by a line at the end of the arrow, like a diode.
- **Gate (G):** The control terminal, represented by a line or an arrow, usually connected to the cathode side, indicating the point where the control signal is applied.

The symbol can be visualized as:

- The main part of the symbol is a **diode-like shape** with an arrow pointing in the direction of conventional current flow (from anode to cathode).
- A **third terminal** (the gate) comes off the middle of the symbol and usually points toward the cathode.

This symbol indicates that the SCR allows current to flow between the anode and cathode only when a triggering signal is applied to the gate.