Four terminal shunts for high sensing efficiency
The HCSK Series from Stackpole is a surface mount metal element high current shunt with four terminals. Four terminal Kelvin sense resistors provide accurate sensing as it removes the effect of lead resistance in the sensing function. The HCSK2725 rated at 5W at an ambient temperature of 100ºC utilises materials and a raised element which provides tolerances as low as 1% and TCR of 50ppm/ºC.
The HCSK has stability over life, high temperature exposure, moisture resistance, rapid change of temperature, and short time overload testing.
The HCSK2725 is available in the 1milliohm resistance value. Other resistance values are possible based on customer demand. It is suitable for sensing currents up to 70 amps.
The high temperature capability, accuracy, and stability are suitable for applications including power modules, frequency converters, motor controls, hybrid power current sensing, E-scooters, and automotive engine controls.
Additional resistance values are currently under development and will be available in the near future. Pricing depends on tolerance and order volume, but typically ranges from $0.50 each to $0.60 each in full reel quantities.
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