Bare element shunts provide lower PCB thermal stress
Current sensing for motor control applications often requires robust current handling and lowest possible PCB temperatures. Unfortunately, high current or overload current handling commonly indicates higher PCB temperatures.
One cost effective and popular solution to these requirements is a raised bare element sense Resistor offered by Stackpole Electronics. The elevated bare element yields PCB temperatures of 30% to 40% less than similar size resistors mounted directly on the PCB surface; it does so by enhancing the convection cooling of the part and lowering the heat conducted into the PCB. The BR shunts are available in 1, 3, and 5W sizes in resistance values from 5 to 100 milliohm.
The all-metal element provides robust pulse and surge handling making the shunt an excellent option for power supplies, industrial controls, small motors and pumps, audio applications, robotics, and portable power tools.