Resistor Manufacturers Professionals These high voltage resistors are available in various designs and they are used for more specific purposes. Many high voltage resistor manufacturers specialize in application and customer designs for high voltage resistor that come in low up to medium volume. Such kinds of resistors may be integrated in different applications and they retain full understanding of technology and application issues.
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. There are also manufacturers that offer application-specific high voltage resistor products that come in low up to medium volume.
The major application of a high voltage resistor has been the circuit protection sensitive elements in power suppliers, but other applications include motor control, anti static system, medical device, divider circuit, military system, balancing and emitter resistor. Manufacturing capability can be defined through various elements or factors which involve voltage, Ohmic range, TCR (temperature coefficient of resistor) and wattage range.
The high voltage resistors provide special requirements which are available on 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 limitation of the voltage has been set through issues on power dissipation such as the 10k resistor having 1 kV across this dissipates 100W which is excessive to the common ¼ watt.
Even in terms of a low current application, physical length of a device of about one centimeter indicating about 5 to 10 kV which arch around a resistor body is a big problem. Some high voltage resistors utilize the spiral path of dark metal oxide. This is actually available in ceramic. This is another type of high voltage resistor. This is known as tiger stripe resistor. The peak voltage capability is more on the function of body length which has a voltage of approximately 50 kilovolt. An important type of resistor is the non-inductive tubular resistor or the bulk ceramic one. 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 is accomplished to obtain rapid energy counterparts. At the same time, this will also suit rapid energy dumping works.
The shunt resistors were associated in a parallel form along with an instrument or the component for diverting 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.
Current shunt resistors were generally low in resistance and passive electronic devices used to measure AC (alternating current) and DC (direct current) going through the voltage drop in which currents created throughout resistance. Shunt resistors’ electrical specifications include ohms current rating, and power rating. Other specifications involved are the power coefficient of the resistance, temperature coefficient of the resistance and the resistance tolerance.
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. On the other hand, the PCR or power coefficient of resistance refers to the temperature that had risen due to self-heating. For the current-sensing shunts, the resistance usually ranges from 100 µO up to 500 mO. Shunt resistors have been utilized in the applications of current conversion in which high precision has been required.
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Shunt resistors’ physical specifications come in different forms. But these include the lead type as well as the resistor materials. 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. A carbon shunt resistor is comprised of resistive, solid, ceramic, and high temperature materials. These were connected by metal contacts. Metal alloy shunt resistors got more than two metallic elements. On the other hand, a wire wound shunt resistor contains thin wire winding in the ceramic rod.
Each shunt resistor becomes unique in the area of packing because of passive electronic components that were packed in tape reel assemblies. This includes carrier tape which had embossed cavities for individual component storage. Some were packed in trails (trays) have been composed of fiber and carbon-power materials while they have been molded in a rectangular outline containing matrices of pockets that are uniformly spaced.
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