A surge protection device (SPD) is configured for electrical installation protection system used in the power grid and communication systems.

It is one of the most powerful and commonly utilised forms of an overvoltage defence system. This can help to reduce the spontaneous voltage of transient energy spikes and electrical noise on the power supply line due to internal load, lighting and other transient disruption. It can also prevent or reduces all additional voltages above the secure level.

However, there are some crucial advantages and disadvantages of surge protector device which are in the following: 

Advantages of SPD: 

• Protection of the circuit from transient voltage levels is an important and crucial element of this device.
• It can effectively manage the voltage ranges and ensure that electrical equipment is not damaged. 
• The systems with the built-in surge protection circuit are secured from burst and surges. 
• The installation and maintenance of these devices are very much easy. 
• The maintenance, additional cost and restoration of these devices are very minimal. 

Disadvantages of SPD: 

• The disadvantage of the SPD is that they can tolerate spikes at a defined level bit after a period of time the circuit may be destroyed. 
• The installation and maintenance of a few construction models are quite complex and challenging.