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Power Metal Strip resistors withstand extreme temperatures

Posted: 25 Feb 2008 ?? ?Print Version ?Bookmark and Share

Keywords:Power Metal Strip? resistors? extreme temperatures?

Vishay Intertechnology Inc. has announced two new high-temperature, surface-mount Power Metal Strip resistors that are said to be the industry's first such devices in the 3921 and 5931 case sizes to offer an operating temperature range of -65C to 275C.

The proprietary construction of the new WSLT3921 and WSLT5931 devices incorporates a solid metal iron-chrome alloy resistive element with low TCR (For designers, this high-temperature capability allows the use of the WSLT3921 and WSLT5931 resistors in harsh, high-temperature environments without sacrificing power rating or electrical performance.

The new devices are suitable for all types of current-sensing, voltage division and pulse applications, including switching and linear power supplies, instruments and power amplifiers in automotive electronic controls such as engine and chassis controls, driver information electronics and climate controls; and industrial controls, including down-hole test/measurement equipment for oil/gas well drilling.

The WSLT3921 resistor measures 10mm x 5.2mm with a maximum height profile of 0.5mm, and the WSLT5931 resistor measures 15mm x 7.75mm with a height profile of 0.5mm. A proprietary processing technique produces low resistance values ranging from 0.001 to 0.004 with tight tolerances of 1 percent and 5 percent.

Like all Power Metal Strip resistors, the new devices feature an all-welded construction that contributes to their superior electrical performance. The WSLT3921 and WSLT5931 provide very low inductance of Offered in tape-and-reel packaging, samples and production quantities of the new WSLT3921 and WSLT5931 high-temperature resistors are already available, with a lead time of four to six weeks for larger orders.

Vishay is one of the exhibitors in the upcoming IIC-China 2008.

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