What Is The Difference Between A Surge Protector And A Fuse

Mday's main products are surge protectors and fuses. But what is the difference between a surge protector and a fuse? Let's start learning！

1. The purpose of surge protectors and fuses

Surge protectors and fuses are both circuit protection components, but they have different uses.

Surcharge protector are mainly used to protect power and signal lines from overvoltage, overcurrent and electromagnetic waves, and to protect the safety and reliability of equipment. It is usually used in power supply, communication, computer and control systems.

Fuses are mainly used to protect circuits from overcurrent, and are generally used in power lines, engine starters, car fuses and other locations. Fuses will automatically cut off the current when a fault occurs to avoid dangerous situations such as equipment damage or fire.

2. The principle of surge protectors and fuses

The function of a surge protector is to protect equipment from overvoltage by limiting the voltage and current in the circuit. Its working principle is based on a circuit of programmable component chips (such as diodes, varistors, metal oxide thermistors, etc.), detects overvoltage conditions in the circuit, and absorbs and reduces overvoltage by adjusting circuit losses, thereby protecting circuit safety.

The function of the fuse is to use the fuse inside the fuse (melting temperature is lower than the rated current of the circuit) to melt and cut off the circuit to protect electrical equipment when an overcurrent occurs in the circuit. This method is to break the circuit by melting the internal components of the fuse, thereby protecting the circuit.

3. The difference between surge arresters and fuses

Surge protectors and fuses have obvious differences in use, principle and working mode:

1>. Different uses: surge protection device are mainly used to protect equipment from overvoltage, and fuses are mainly used to protect equipment from overcurrent.

2>. Different working principles: whole house surge protector absorb and reduce overvoltage by adjusting circuit losses, thereby protecting circuit safety; while fuses protect electrical equipment by melting the fuse and cutting off the circuit.

3>. Different response speeds: power surge protector usually have a fast response speed and can work within a few microseconds, while fuses have a relatively slow response speed and may take tens of milliseconds or longer to play a protective role.

lightning surge arrestor and fuses play different roles in circuit protection. Surge protectors focus on protecting circuits from overvoltage and electromagnetic waves, while fuses focus on protecting circuits from overcurrent. There are also significant differences in their working principles and response speeds. When choosing a device to protect the circuit, you should choose it based on actual needs.