What are the advantages and disadvantages of SCR?

Advantages:

• The SCR (silicon controlled rectifier) can handle large voltage, current and power.
• The Triggering circuit for silicon controlled rectifier (SCR) is simple. The SCR is easy to turn ON.
• The SCR can be protected with the help of fuse.
• It is able to control AC power.
• It is simple to control.
• It cost is low.

Disadvantages:

• The SCR (silicon controlled rectifier) is unidirectional devices, so it can control power only in DC power during positive half cycle of AC supply, thus only DC power is controlled with the help of SCR.
• The gate current cannot be negative.
• In AC circuit, it needs to be turned on each cycle.
• It cannot be used at higher frequencies.