Power

Wraparound resistors increase density in 0805 case size

16th May 2017
Caroline Hayes

PCIM Europe 2017: Vishay Intertechnology has introduced a series of thick film surface-mount wraparound chip resistors with high power ratings of 0.33 W in the compact 0805 case size.

The RCWH thick film chip resistors provide over two and a half times the power density of standard resistors in the 0805 footprint, claims the company.

The resistors are designed to save space and reduce component counts in telecommunications, computer, industrial, and consumer applications. They can be used instead of larger high power components or multiple lower power devices in new or existing designs to reduce board space requirements and placement costs, and enable smaller and lighter end products.

They provide higher reliability than larger thick film devices by reducing the co-efficient of thermal expansion (CTE) mismatch with the PCB, thereby lowering solder joint stress, says the company. They offer low resistance values from 0.01 to 0.976Ω, tolerance down to ± 0.5%, and TCR down to ±100ppm/°C. They are RoHS-compliant and halogen-free, and have a protective metal glaze on high quality ceramic. They can be used as current sensing resistors and shunts in DC/DC converters, voltage regulation modules, and inverters in mobile phones, computers, air conditioners, and heat pumps.

Samples and production quantities are available now, with lead times of six to eight weeks for large orders.

 

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