Four terminal shunt resistors reduce effects of lead resistance

Designing high power products that demand high efficiency performance can be difficult. Low value resistors are needed to attain efficiency; however, it is common for two terminal resistors to result in significant measurement errors due to terminal resistance.

Stackpole Electronics’ CSSK3637 Series provides a solution to engineers requiring high power and high efficiency performance. The series is rated at 3W. Its four-terminal design provides for the forced current to flow via the larger terminations while supplying accurate voltage sensing at the narrow terminals. The series provides excellent TCR down to ±50ppm and resistance tolerance down to ±0.5% for exceptional precision. The CSSK is provided in resistance values from 0.5 to 6mOhm making it able to sense currents of over 77A.