Thick film chip resistors save space, reduce component counts and costs

Vishay Intertechnology has introduced a new series of thick film surface-mount wraparound chip resistors with high power ratings of 0.33W in the compact 0805 case size. Offering a power density over 2.5x higher than standard devices in this footprint, Vishay Dale RCWH series resistors are designed to save space and reduce component counts in telecommunications, computer, industrial, and consumer applications. With their high power density, the devices released today can be used instead of larger high power components or multiple lower power devices in new or existing designs. This reduces board space requirements and placement costs while enabling smaller and lighter end products. In addition, the resistors provide higher reliability than larger thick film devices by reducing the coefficient of thermal expansion (CTE) mismatch with the PCB, thereby lowering solder joint stress. The series offers extremely low resistance values from 0.01ohm to 0.976ohm, tolerance down to ± 0.5% and TCR down to ±100ppm/C. RoHS-compliant and halogen-free, the resistors feature a protective metal glaze on high quality ceramic. They are optimized as current sensing resistors and shunts in DC-DC converters, voltage regulation modules, and inverters in cell phones, computers, air conditioners, and heat pumps.