CSS4527 Series

The CSS4527 from Stackpole is a 5 W size, ultra-precision current sensing resistor. The CSS4527 features resistance values from 0.5 mΩ up to 120 mΩ, in tolerances down to 0.5% and 50 ppm TCR. The all-metal construction allows the CSS4527 to flex with the PCB in response to thermal stresses, where a ceramic-based, current-sense chip resistor may crack or have cracked solder joints. In addition, the CSS/CSSH series is capable of full power operation in temperatures up to 100°C and can operate in temperatures up to 225°C.

The CSS4527 is an ideal choice for current sensing in power supplies, motor controls, high power regulators, robotics, industrial controls, gasoline and diesel engine controllers, UPS systems, network diagnostic equipment, medical equipment, and rechargeable power tools.

CSS/CSSH Series

The CSS/CSSH series of ultra-stable metal element current-sense resistors are available in chip sizes from 1206 to 2728 and power ratings from 0.5 W to 4 W. The all-metal construction eliminates problems with part or solder-joint cracking, which are often a concern for larger chip sizes. This series is capable of resistance tolerances down to 0.5% and TCRs down to 15 PPM. This ensures precise power management over a wide range of ambient temperatures.

The CSS/CSSH series is designed for high current, high power, high temperature, and high precision current-sensing requirements. The metal plate element and unique trimming process yields a highly stable device at high currents and is capable of operation at full rated power up to 100°C. The CSS/CSSH series allows operation up to temperatures of 275°C. In addition, market drivers for 1 W and higher current sense resistors continue to push for lower resistance values. The CSS/CSSH series is available in resistance values down to 0.25 mΩ.