Shunt Resistor


Shunt resistors are usually associated a parallel position along with an instrument or the component. This is done to divert an 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.  The electrical specifications of the shunt resistors involve resistance tolerance, power rating, resistance power coefficient, resistance temperature coefficient, ohms, and current rating.

Ohm is used to measure the material’s opposition into the flow of electricity circuit. On the other hand, the temperature coefficient of resistance (TCR) is the resistance change with change in temperature. 


Surface Mount Resistors


PCR or the power coefficient of resistance is referring to a temperature. This temperature rises because of 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.

The physical specifications for the shunt resistors involve resistor materials and lead type. 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. Carbon shunt resistors were composed of resistive, ceramic, solid and high temperature materials that were bonded by metal contacts. 

DC Current Shunts


Metal allow shunt resistors have 2 or more elements while a wirewound shunt resistor has thin wire winding in a 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.

What Are Shunt Resistors?