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Resistors offer TCR to ±10 ppm/°C, stability to ±0.05%

Wed, 09/18/2013 - 12:18pm

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Vishay Precision Group announced that its Vishay Foil Resistors brand (VFR) has released a new series of high-precision foil surface-mount current sensing flip chip resistors with low TCR down to ±10 ppm/°C from -55°C to +125°C, +25°C ref.; resistance down to 0.001 Ω; and tight tolerances to ±0.5%. Within this series, the RBH model is offered with a four-terminal Kelvin design. While typical current sensing resistors offer load-life stability of 0.5% through a 1,000-hour workload, the RB Series provides stability of ±0.05% at 70°C for 2,000 hours at rated power and screening options in accordance to MIL-PRF 55342 and MIL-PRF 49465 for enhanced reliability and performance in a range of applications, including precision current measurement.

The RB Series includes the RBD, RBF, and RBH resistors, which offer power ratings of 0.5 W, 1 W, and 1.5 W, respectively, in compact case sizes. The devices feature short time overload of ±0.03% (300 ppm); a voltage coefficient of <0.1 ppm/V; a non-inductive (<0.08 μH), non-capacitive design; and a resistance range from 0.001 Ω to 1 Ω. 

The RB Series, built on VFR's Bulk Metal Foil technology and developed by the company's R&D team in Japan, outperforms all other resistor technologies available today for applications that require high precision and high stability. It provides a low and predictable TCR, as well as excellent load-life stability, and allows for the production of customer-oriented products designed to satisfy challenging and specific technical requirements. The devices' flip chip configuration saves 35% on PCB space when compared to a surface-mount chip with wraparound terminations.

Samples and production quantities of the RB Series are available now, with lead times of five working days for samples and six weeks for larger orders. Pricing for U.S. delivery starts at $3.48.

Further information about the RBD, RBF, RBH, and other Vishay Foil Resistors products is available at www.vishayfoilresistors.com.

 

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