The Resistor Professionals 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. Such kinds of resistors may be integrated in different applications and they retain full understanding of technology and application issues.

These manufacturers know that users are trying to prevent risking and compromising the component and system failure. They do this through using standard products of resistors. These do not get the exact specification being asked but they are actually the closes materials available. There have been manufacturers that are offering products for high voltage resistor that are application-specific and are available in low to medium volumes.

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. The capability to manufacturer depends on some elements. These involve the TCR or temperature coefficient of resistor, wattage ranges, ohmic ranges, and voltage.
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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. Voltage limitation will be set through the problems in power dissipation. This involves the 10K resistors with only 1 kv through it dissipating 100W in which it is excessive to a common one-fourth 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. Apart from it, some high voltage resistors were using spiral path of the dark ceramic metal oxide. This high voltage resistor is called as tiger stripe resistor. Peak voltage capability is on body length’s function. Its voltage is 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.
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Shunt resistors have been integrated in the parallel form with the component or instrument in order to divert the electrical current. These types of resistors provide alternative current paths in case there have been problems or failure and these are used for complete reduction of input sensitivity from the input lines through the ground.

The current shunt resistor has been generally passive and low resistance electronic devices that have been utilized in measuring DC (direct current) and alternating current (AC) through a voltage drop that the currents had created all through the resistance. The electrical specifications of the shunt resistors involve resistance tolerance, power rating, resistance power coefficient, resistance temperature coefficient, ohms, and current 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. The power coefficient of resistance or PCR is the temperature that arise because of self-heating. For the current-sensing shunts, the resistance usually ranges from 100 µO up to 500 mO. A shunt resistor can be applied in current conversion. This is the aspect in which high precision has been required.

The physical specifications present in shunt resistors are resistor materials and even the type of lead. A shunt resistor can be surface mounted, chassis mounted, through-hole mounted, and bolted. Through-hole technology (THT) and surface mount technology (SMT) have been the other typical and well-known mounting styles. The other kinds of lead are screw terminals, J-leads, and tab terminals. There are also gull-wing leads, radial leads, and axial leads available.

There is also a shunt resistor that has no leads. These are the wire wound, thick film, metal alloy, thin film, ceramic, metal film, metal oxide and carbon film. Carbon shunt resistors were composed of resistive, ceramic, solid and high temperature materials that were bonded 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.