LR2F4K7

Through Hole Resistors

Through Hole Resistors, known as Fixed Wire Wound Resistors, refer to resistors that are constructed with one end embedded in the printed circuit board (PCB) and the other end extending out of the holes found in the board. This helps to provide improved accuracy, stability, and thermal capacity than other forms of resistors. The main components of a through hole resistor are an insulating material, an electrode and a resistive material. LR2F4K7 is a type of through hole resistor.

Application Field and Working Principle

LR2F4K7 is an very high power wirewound resistor with cases up to 2.3" in diameter. It is wired to the board with a threaded nut. This allows heat to dissipate around the mounting surface helping to reduce the power rating required. The overall power rating of the resistor is determined by its winding material, resistor case shape, wattage rating, and type of cooling desired. It can be used in the fields of telecommunications, industrial control, automotive, and appliance industries and so on.

The working principle of LR2F4K7 is the same as other wire-wound resistors. It is made up of a conductive wire wound tightly around a ceramic core, with an insulated coating to protect the metal from the environment. Sometimes, the coating is also used as a heat spreader to ensure consistent performance and prevent localized hot spots. As current passes through the resistor, the increasing resistance from the wire winding creates a voltage drop. This voltage drop is what is measured and used as a reference when determining the power rating of the resistor.

Therefore, the application field and working principle of LR2F4K7 can be concluded as: LR2F4K7 is a type of through hole resistor which is very suitable for very high power consumption fields such as telecommunication, industrial control, automotive, appliance industries and so on. It works by utilizing the increasing resistance of the wire winding of the resistor to create a voltage drop, the voltage drop than be used as a reference to determine the power rating of the resistor.