Ultra-High-Precision Wraparound Resistors Spec’d to 225 C

To meet the growing demand for precise, stable, and reliable resistors that can operate in harsh environments, Vishay Precision Group, Inc. announced today that its Vishay Foil Resistors (VFR) brand has introduced a new series of ultra-high-precision Z1 Foil Technology wraparound surface-mount chip resistors designed for high-temperature applications to +225 degrees C. Featuring gold-plated terminals for design flexibility, FRSG Series devices offer low TCR of ±2.5 ppm/degree C maximum from -55 to +200 degrees C, +25 degrees C ref.; tight tolerances to ±0.01%; and load-life stability to ±0.1% after 2,000 hours of working power at 200 degrees C.

"Built on Z1 Foil Technology, FRSG Series devices are able to extend the advanced performance features of Bulk Metal® resistors — including tight tolerances and excellent load-life stability — to high-temperature environments, without sacrificing their low TCR," said Jacky Acoca, VFR director of sales and marketing. "In addition, the devices' gold-plated terminals support a wide range of mounting methods used throughout the industry, providing designers with the flexibility to meet the needs of their specific applications."

Optimized for down-hole drilling, oil and gas exploration, and avionics, military, and space (AMS) applications, the resistors released today offer a resistance range from 10Ω to 125kΩ, with any conceivable ohmic value within this range — to six digits — available with no additional cost or lead time effect. Available in six case sizes from 0603 to 2512, the devices provide working power to 750mW at +70 degrees C and 300mW at +200 degrees C.

The resistors feature a rise time of 1ns with effectively no ringing, a thermal stabilization time of <1s (within 10 ppm of steady state value), current noise of ≤0.010 μVrms/V of applied voltage (<-40 dB), and a voltage coefficient of <0.1 ppm/V. Offering the utmost in ESD immunity, the RoHS-compliant devices withstand electrostatic discharges of at least 25 kV for increased reliability and offer a non-inductive (<0.08 μH), non-capacitive design. Rapid prototype samples are available on request. Production quantities are available in as few as 10 weeks.