One of the oldest types of resistors that is still being used today is the wirewound resistor. In the construction of a wirewound resistor, there is a metallic wire that is wound around a core of insulation materials like plastic, fiberglass, or ceramic. But, the areas of application of wirewound resistors differ extensively. There are two types of wirewound resistors that you can find today namely the power wirewound resistor and the precision wirewound resistor. You can use these two types of wirewound resistors in many different applications. They may be adapted for use in temperature and current sensors. The best information about custom wirewound resistor is available when you click the link.
The precision wirewound resistors are used in accurate calibration devices and measuring bridges. The tolerance of these very accurate resistors is under one tenth percent. These types of resistors are better than major other types of metal film resistors. It is very stable and has a value of 30 ppm alteration for twelve months of functioning at full power rating. Precision wirewound resistors are made for increase in temperatures of ordinarily lower than 30 degrees Celsius. And this is the reason why they are sometimes coated with epoxy material.
The power wirewound resistor has a range that varies from 0.5 watts up to more than 1000 watts. This resistor can further be categorized into different kinds by their coating type. There are those coated with silicon resin for the lowest dissipation ranges. These resistors are small and are able to endure increase of temperature to a maximum of 300 degree Celsius above the normal level. The second kind of coating is the porcelain enamel. This is a traditional coating which offers good insulation properties at low temperatures. However, the insulation is less at higher temperatures. That is why this type is less common. The maximum operating temperature with this coating is 400 degrees. The ceramic coating is another coating category for power wirewound resistors. This is the most standard type of coating. These resistors feature a ceramic core and coating to protect the wire. Be excited to our most important info about power resistors.
Effective energy dissipation is provided by the coasting. Yet, it also has good insulation properties. The coatings also provide the resistor with physical protection. These resistors can warm up to around 300 degrees without problems. Resistors that have the largest power ratings feature an aluminum case with fins. These give a larger surface area that can dissipate heat and permits the resistor to handle more electrical power without getting weakened. This surface gives the best insulating resistance
