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Basic Understanding of What Shunt Resistors Are
Shunt resistors have been integrated in the parallel form with the component or instrument in order to divert the electrical current. Such kinds of resistors are designed to give alternative path for current in case there is a failure. They can be used to reduce input sensitivity coming from the input lines proceeding directly 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.
Surface Mount Resistors
PCR or the power coefficient of resistance is referring to a temperature. This temperature rises because of self-heating. In terms of current-sensing shunts, resistance is usually ranging in between 100 µO and 500 mO. The shunt resistor is being used in the current conversion application and it requires high precision. Shunt resistors’ physical specifications come in different forms. But these include the lead type as well as the resistor materials. The shunt resistors may be bolted, surface mounted, through-hole mounted, and chassis mounted. Through-hole technology (THT) and surface mount technology (SMT) have been the other typical and well-known mounting styles. Some of the types of lead include J-leads, screw terminals, tab terminals, gull-wing leads, axial leads, and radial leads.
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. A carbon shunt resistor is comprised of resistive, solid, ceramic, and high temperature materials. These were connected by metal contacts.
Wirewound Resistors
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.
