Resistor Manufacturer To-do's The high voltage resistors can be found in various designs. Each of these resistors is used for different purposes and applications. Most of their manufacturers are specializing in the design of a customer or application specific high voltage resistor in a low to medium volume. These resistor types are available for various applications. Each of them retains the technology and application issues’ understanding.
Manufacturers should completely understand that users avoid compromising and risking the failure of the component or system through stand resistor product usage. These are not obtaining the main specification required. However, they were known to be the closest materials. Some manufacturers provide application-specific products for high voltage resistor. They are available in low to medium volumes.
A high voltage resistor major application is circuit protection sensitive elements present in a power supply. Other applications include motor control, medical devices, anti static systems, balancing and emitter resistors, military systems (RADAR, SONAR) and divider circuits. The capability to manufacturer depends on some elements. These involve the TCR or temperature coefficient of resistor, wattage ranges, ohmic ranges, and voltage.
High Power Resistor
High voltage resistors have special requirements. These requirements are asked in the aspect of high voltage applications. The common little one-fourth watt carbon film resistors that can be found in many electronics are rated from 250 up to 500 volts which is below the level of kilovolt required. The voltage limitation is set through the power dissipation issues like a 10k resistor with one kilovolt across it dissipating 100 watts.
When it comes to lower current applications, the device physical length has been about 1 cm which indicate from 5 to 10 kilovolt arching around the body of a resistor has been a great problem. Apart from it, some high voltage resistors were using spiral path of the dark ceramic metal oxide. This is another type of high voltage resistor. This is known as tiger stripe resistor. Its capability of peak voltage is usually the body length function and they come in voltage that is ranging about 50 kiloVolt. One essential kind of this resistor has been the non-inductive bulk ceramic or tubular resistor. Due to extremely resistive volume of the materials, these resistors have been well pulsed power. When compared to metal film or wire wound counterparts, they will be higher. It has been done for ensuring that they will be suitable for rapid energy dumping as well as higher energy pulse works.
Shunt resistors have been integrated in the parallel form with the component or instrument in order to divert the electrical current. These have been providing the alternative paths for current just in case there is failure and may be utilized to complete the reduction in the sensitivity of input from an input line going to the ground.
A current shunt resistor is a low resistance and passive electronic device that is used to measure AC (alternative current) and DC 9direct current). This is directly proceeding to the voltage drop in which currents created all throughout the resistnace. Shunt resistor electrical specifications include power rating, temperature coefficient of the resistance, resistance tolerance, current rating, ohms, and power rating.
Ohm is measuring the opposition of the material to the electricity circuit flow while the TCR or temperature coefficient of resistance is referring to resistance change with temperature change. PCR or the power coefficient of resistance is referring to a temperature. This temperature rises because of self-heating. The resistance in current-sensing shunts varies. It usually ranges from about 100 µO up to 500 mO. The shunt resistor is being used in the current conversion application and it requires high precision.
The physical specifications present in shunt resistors are resistor materials and even the type of lead. These shunt resistors may get surface mounted and chassis mounted. They can also be bolted and through-hole mounted when desired or depending on the main application. Surface mount technology (or SMT) and through-hole technology (or THT) were both common styles of mounting. Some of the types of lead include J-leads, screw terminals, tab terminals, gull-wing leads, axial leads, and radial leads.
The shunt resistors that have no leads have been also available and the choices are thick film, wire wound, thin film, metal alloy, metal film, ceramic, carbon film, and metal oxide. The carbon shunt resistor has been comprised of high temperature, resistive, solid and ceramic materials that have been bonded by the metal contacts. The metal alloy shunt resistor contains more than 2 metallic elements and the wire wound shunt resistor has been composed of thin wire winding into the ceramic rod.
Shunt resistors differ in terms of packing methods because some passive electronic elements are packed in the reel tape assemblies along with a carrier tape which embossed cavities for storing individual component. Others have been packed in trays (or trails) and they had been made up of carbon-power and fiber materials as they molded in rectangular outlines containing uniformly spaced matrices of pockets. Some of them have been packed in a tray (trail) and were comprised of both fiber and carbon-power materials. At the same time, these are molded in a rectangular form that has numerous pockets which were uniformly spaced.
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