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Surface-mount resistor provides high power ratings

Posted: 12 Jan 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Bulk Metal Z Foil? resistors? Vishay? VSMP? surface mount?

Vishay Intertechnology Inc. released its VSMP series of surface-mount Bulk Metal Z Foil resistors, which provide high power ratings up to 750mW at 70C; long-term stability down to 0.005 percent; low typical TCR of less than 0.2ppm/C; excellent PCR of 5ppm at rated power; and tight tolerance of 0.01 percent.

The VSMP series consists of five resistors (including VSMP1206, announced in late 2004) that span a range of surface-mount case sizes from 0805 to 2512, maximum power ratings of 200mW to 750mW, and a resistance range of 10 ohm to 150 kilohm, with lower and higher values available by request. They achieve excellent load-life stability of 0.01percent at maximum power, and stability of 0.005 percent at decreased power.

The VSMP resistors also feature a low thermal EMF of less than 0.05?V/C, voltage coefficient below 0.1ppm/V, inductance lower than 0.08?H, and response time faster than 1ns. The noise generated by these resistors is less than -40dB, or essentially noise-free.

A conventional wrap-around termination and top coating ensure safe handling during the mounting process, and provide stability during the multiple thermal cyclings the device will experience over its lifetime. Both Pb-free and tin/lead alloy terminal finishes are available.

Target applications for the VSMP resistors include automatic test equipment; high-precision instrumentation; laboratory, industrial and medical equipment; high-end stereos; electron beam scanning and recording equipment; and military, space, airborne and downhole instruments and communications systems.

Available in waffle-pack and tape-and-reel packaging, samples and production quantities of the VSMP series of resistors are already available. Lead time for production quantities is four to six weeks, and less on request.

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