23121000409

Fuses

A fuse is a type of protective device, used to protect electrical circuits from overload. Fuses consist of two parts: a fuse element, and a protective device. The fuse element is made of low-melting metal and is held within the protective device. When the current in the circuit exceeds a certain level, the metal element melts, stopping the current flow and protecting the circuit. The 23121000409 fuse is a high-current fuse that is designed to protect electric motor circuits from overload. It is a type of Resettable fuse, also known as a PTC (positive temperature coefficient) fuse.

Features of 23121000409 Fuse

• The 23121000409 fuse has a very high breaking current (30A).
• It has a fast response time (50ms).
• It has a high-temperature rating (105°C).
• It has a low temperature coefficient (TC≤0.2).
• It is a resettable fuse for electric motor circuits.

Application Field of 23121000409 Fuse

The 23121000409 fuse is used mainly in electric motor circuits. It is suitable for use in the following areas:

• Electric vehicles
• UPS and emergency systems
• Electric lighting systems
• Sound systems
• Heaters and air conditioners

Working Principle of 23121000409 Fuse

The 23121000409 fuse is a PTC (positive temperature coefficient) fuse and functions according to the PTC principle. When the current in the circuit exceeds a certain level, the PTC film within the fuse element starts to heat up. As the temperature of the film rises, its resistance increases, limiting the current flowing through the element. As the current is limited, the heat generated is dissipated, and the temperature of the film decreases, allowing the current to continue to flow. This cycle repeats itself until the current reaches its maximum level, at which point the fuse element melts, thereby protecting the circuit from further damage.

Advantages of 23121000409 Fuse

• The 23121000409 fuse has a very high breaking current, allowing it to protect electric motor circuits from overload.
• It has a fast response time, allowing it to react quickly to protect the circuit.
• It has a high-temperature rating, allowing it to function in high-temperature environments.
• It has a low temperature coefficient, making it more reliable and stable.
• It is a resettable fuse, meaning it can be reset after it has blown, allowing it to be used over and over again.

Disadvantages of 23121000409 Fuse

• The 23121000409 fuse has a limited maximum breaking current, meaning it can only protect against limited levels of overload.
• It is not suitable for use in circuits with very high currents.
• It is not suitable for use in circuits with low impedance.
• The resettable nature of the fuse means that it can be reset after it has blown, but this can lead to subsequent overloads if the root cause of the overload is not addressed.