BK/PCB-4-R

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BK/PCB-4-R application field and working principle

BK/PCB-4-R electronic fuse is an active component that can automatically break the circuit to protect the circuit when the current of the circuit exceeds the protection current of the component itself, thus avoiding the damage caused by the circuit overload or short circuit current. It is widely used in electronic equipment, automobiles, power distribution systems, air conditioners and refrigerators, lighting equipment, TVs, etc. It is the most widely used one among series of products.

The working principle of the BK/PCB-4-R electronic fuse is based on the temperature rising law of the metal wire in the electric circuit. When the current passing through the fuse is normal, the temperature rise of the metal wire is small, the fusible element will not be melted, and the circuit will not be broken. When the current passing through the fuse exceeds the specified value, the temperature of the metal wire increases sharply, the fusible element is melted, the contact of the fuse disappears, and the circuit is disconnected to protect the circuit from damage.

The function of BK/PCB-4-R electronic fuse is mainly used in the situation of overload current, short circuit current protection, and can increase the safety factor of circuit operation. In the selection of BK/PCB-4-R electronic fuse, it must take into account the protection value, the capacity of the load current, and the verification size of the fuse current, in order to make the current of the circuit within the safe range of BK/PCB-4-R electronic fuse.

The characteristics of BK/PCB-4-R electronic fuse are high breaking capacity, small size, fast protection speed, thermal current, high accuracy and perfect structure. The product has wide range of application and market coverage. It is mainly used in electronic equipment, power distribution equipments and other current limit protection devices.

Thermally enhanced materials are used for the fuse of the BK/PCB-4-R series. This material has a high safe temperature coefficient, so that when a short circuit or overload current flows, the temperature inside the fuse can be quickly raised, and the current will be stopped in a short time. The BK/PCB-4-R devices are UL certified and CSA certified and UL listed.

High Dielectric Strength, High Temperature Coefficient Resistor and Glass Tube fuse are the main components of BK/PCB-4-R electronic fuse. The role of the high dielectric strength resistor is to limit the inrush current during start-up. When an overcurrent occurs, the current goes through the resistor and the metal winding to heat up the fuse element, with the temperature coefficient of the resistor rising rapidly. The glass tube fuse does the job of breaking the circuit when the fuse element melts. The current flowing through the fuse element will be quickly stopped, thus effectively preventing the circuit from damage.

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