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Chip resistor in 2512 case size handles 2W

Posted: 05 Oct 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Stackpole? RHC? 2512? chip resistors? resistor?

Stackpole Electronics Inc. has introduced a high-power, thickfilm chip resistor in a 2512 case size that is capable of handling 2W of power. The RHC series incorporates a unique design with specialized materials and processes that enable the resistors to run 30C cooler than standard 2512 chips and exhibit solder joint temperatures well below the 105C industry standard for circuit boards. Maximum 5s overload power is also increased by 70 percent over standard 2512 chips, and the performance of the RHC shows no additional resistance shift for the EIA 575 standard short time overload test at the elevated power rating, according to the company.

The RHC series is able to achieve tolerances of 1 percent and 5 percent at a TCR of 100ppm as a standard product. The chip resistors are available in E24 values from 0.1 ohm to 1 megaohm, and offer a continuous working voltage of 200V. The only significant dimensional change is a larger bottom termination, which provides a more reliable termination with better heat conduction.

The RHC resistor has a special resistive element and coating that offer better heat transfer to the ambient air and are more tolerant of higher temperatures associated with high power, said the company. The product is also trimmed to more evenly distribute heat over the surface of the resistive element rather than concentrate the heat on a single hot spot as with normal calibration trims.

The RHC series resistors are suitable for applications requiring high-power density such as large control systems, power supplies, industrial machinery controls, high-power communications, UPS systems, HVAC controls, welding equipment and commercial ovens. The RHC devices are RoHS compliant.

Standard pricing for the RHC 2512 is 12 cents each for the 5 percent tolerance model and 18 cents each for the 1 percent tolerance model. Available on tape and reel in 4,000 pieces, samples are available in three to four weeks.

- Gina Roos

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