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5W resistor in 2818 package from Vishay

Posted: 15 Feb 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Vishay? Power Metal Strip resistor? WSH2899818? resistor?

Vishay Intertechnology Inc. announced a new 5W Power Metal Strip resistor which it touts as the industry's first such device to offer 5W capability in the small 2818 package size. The new WSH2818 surface-mount resistor is designed for use in current-sensing, voltage division and pulse applications, and features low resistance values ranging from 1 milliohm to 100 milliohms.

According to the press release, the Vishay Dale WSH2818 resistor also features a proprietary construction with improved thermal management to enable a 5W power rating in a small package size that maintains the superior electrical performance of the Power Metal Strip construction. With this, explained Vishay, designers are able to incorporate the WSH2818 in place of larger surface-mount components to realize significant board-space savings and enable manufacture of smaller, lighter end products. Alternatively, the designer can use one WSH2818 as a space- and cost-conserving replacement for multiple discrete resistors featuring lower power ratings.

Target applications for the WSH2818 resistor include DC/DC conversion and VRMs in desktop and notebook computers; electronic controls in automotive systems; base station power supplies in telecom systems; Li-ion battery protection and battery charging systems in notebook computers and consumer electronics; and motor controls for industrial systems.

In addition to a power rating of 5W, the WSH2818 offers low inductance values (<5nH), low thermal EMF and 'excellent' frequency response. This device is rated for operation between the -65C to 170C temperature range, and is RoHS compliant and Pb-free, featuring terminals with a 100 percent matte tin finish over a nickel barrier.

The WSH2818 is available in tape-and-reel packaging of 7.1-by-4.6-by-0.813mm. Samples and production quantities of the new resistor are already available, with a lead time of eight to ten weeks for larger orders.

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