Thyristor Basics

Front

What is a thyristor?

Back

A thyristor is an electronic component that creates a latching circuit, allowing electricity to flow until reset.

Front

How does a thyristor differ from a transistor?

Back

Unlike transistors, thyristors remain on even if the input voltage is removed, until they are reset.

Front

Why are thyristors useful in alarm circuits?

Back

They allow electricity to flow continuously until reset, making them reliable for alarms.

Front

What happens when the gate leg receives a signal?

Back

The thyristor switches on fully, allowing electricity to flow between the cathode and anode.

Front

How is a thyristor triggered?

Back

By a small trigger pulse of current at the gate.

Front

Diagram showing the operation of a thyristor with labeled parts: gate, anode, cathode.

Back

Front

What needs to be done to turn the current back on in a thyristor circuit?

Back

The switch needs to be closed and an input signal voltage applied again.

Front

What does the circuit on the left do when SW1 is closed?

Back

It switches the current through the output device on.

Front

What is required to interpret circuit diagrams containing thyristors?

Back

Understanding of the operation of circuits with electronic components including thyristors.

Front

Effect of the thyristor being turned on.

Back

Allows current to flow from the anode to the cathode, causing the buzzer to sound.