There are different kinds of power resistors that are worth exploring, most especially that they help power devices and make them last. However, this short article will focus more on the wirewound resistor. Basically, wirewound resistors are among the oldest kinds of power resistors being used until this day. All wirewound resistors have been constructed with the same concept in mind. That is, a metallic wire will be winded around the inside of an insulating material; hence, the name. But then, in terms of application for this kind of resistor, it is not the same. You see, when it comes to wirewound resistors, they can be grouped into two major kinds. You have the precision and the power wirewound resistor. Nonetheless, all wirewound resistors can be used in a wide array of applications. They can be used depending on the current and temperature sensors. For more information about the current sense resistor
, follow the link. Here is a close look at these two major kinds of wirewound resistors.
When you say precision wirewound resistors this is the type that is usually utilized in accurate measuring bridges and calibration devices. Since they are very accurate as power resistors, they have a tolerance of only below one tenth percent. Its temperature coefficient is more or less 5 ppm/C. This coefficient is much better compared with other major metal film resistors that have an average of 25 ppm/C. It has a fairly good stability where its value is at 30 ppm alteration for the entire twelve months that it will function at a power rating that is full. These power resistors are specifically made for temperatures that increase lower than 30C. Owing to this fact, you need not wonder why they come with epoxy material coatings. Visit the official site for more information about wirewound Resistor company
Meanwhile, power wirewound resistors have a power range of between 05 watts and 1000 watts. These power wirewound resistors can the be categorized into various kinds. This can be done when they are broken down into what coating type they are using. For lowest dissipation ranges, silicon resins are the most commonly utilized. These are often small power wirewound resistors that can withstand temperatures that increase until 300C above the normal temperatures. Another type of power wirewound resistor is the porcelain enamel that is also a coating type. This is a traditional coating type that offers good insulation properties at temperatures that are low. However, they will not be able to provider good insulation when higher temperatures are required. This makes them less common than other types of power wirewound resistors. For this coating, the maximum operating temperature is 400C.