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VPG Releases New FRSM Chip Resistors With Stability to ±0.0025%, TCR to ±0.05 ppm/°C, ESD Protection to 25 kV or More, and Tolerances to ±0.01%
Next-Generation Z1-Foil Technology Sets New Stability Standard With an Order of Magnitude Improvement in Temperature Stability, Load-Life Stability, and Moisture Resistance
MALVERN, PENNSYLVANIA — April 13, 2011 — Vishay Precision Group, Inc. (NYSE: VPG) today announced that its Vishay Foil Resistors division has released a new series of ultra-high-precision Z1-Foil wrap-around chip resistors with exceptional load-life stability of ±0.0025% (25 ppm) at 70 °C and rated power for 2,000 hours and ±0.005% for 10,000 hours, low typical TCR of ±0.05 ppm/°C from 0 °C to +60 °C and ±0.2 ppm/°C from -55°C to +125°C, +25°C ref., power TCR (ΔR due to self heating) of 5 ppm at rated power, and tight tolerances to ±0.01 %.
The FRSM series is based on Vishay Foil Resistors’ next-generation Z1-Foil technology. FRSM devices excel over all previous stability standards for precision resistors with an order of magnitude improvement in temperature stability, load-life stability, and moisture resistance. These new benchmark levels of performance provide design engineers with the tools to build circuits not previously achievable, while reducing costs in the most critical circuits by eliminating the need for corrective circuitry.
In addition to their remarkably improved load-life stability of ±0.0025%, the resistors are noise-free and provide ESD protection to of 25 kV or more for increased reliability. The devices’ solid element alloy is matched to the substrate, forming a single entity with balanced resistance versus temperature characteristics for an unusually low and predictable TCR over a wide temperature range from -55 °C to more than +175 °C. The adhesive that holds the foil to the flat substrate withstands high temperatures, pulsing power, moisture incursions, shock and vibration, and low-temperature exposure, while still holding securely to the foil element. Resistance patterns are photo-etched into the element to permit the trimming of resistance values to very tight tolerances as low as 0.01%.
Offered in six chip sizes from 0603 to 2512, the FRSM series features a wide resistance range from 5 Ω to 125 kΩ. Within this range, any “as required” value (e.g. 1.2345 kΩ vs. 1 kΩ) can be supplied at no extra cost or delivery time. The resistors feature power ratings to 750 mW at +70 °C, a rise time of 1.0 ns, with effectively no ringing, a thermal stabilization time of <1 s  (nominal value achieved 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. The RoHS-compliant devices offer a non-inductive (<0.08 μH), non-capacitive design, and are available in matched sets upon request.
The FRSM series is optimized for a wide variety of demanding high-precision, high-temperature applications, including space and aviation. The devices provide exceptional levels of performance for differential amplifiers, switching power supplies, weighing systems, electron microscopes, measurement systems, mass flow meters, pressure controllers, medical instrumentation, down-hole equipment, data acquisition and control systems, and more.
Samples and production quantities of the FRSM series are available now, with lead times of five days for samples, and eight weeks for standard orders.
Further information about the FRSM series and other Vishay Foil Resistors products is available at Follow Vishay Foil Resistors at
About Vishay Foil Resistors
Vishay Foil Resistors is a division of Vishay Precision Group, producing the most precise and stable type of resistors available. The portfolio comprises products in a variety of resistor configurations and package types to meet the needs of a wide range of applications: discrete resistors and resistor networks in surface mount and through-hole (leaded) configurations; customized chip resistor networks; precision trimming potentiometers; and discrete chips for use in hybrid circuits. The foil resistors and current sensors are used in applications requiring a high degree of precision and stability, such as in medical testing equipment, high performance audio equipment, precision measuring instruments and aerospace and military applications.
About Vishay Precision Group
Vishay Precision Group (VPG) produces sensors based on precision resistive foil technology, and sensor-based systems. It provides vertically integrated products and solutions for multiple growing markets in the areas of stress, force, weight, pressure and current measurements. As a spin-off from Vishay Intertechnology, VPG’s decades-long track record encompasses innovations in foil precision resistors, current sensors, and strain gages, which have served as a foundation for VPG’s more recent expansion into strain gage instrumentation, load cells and transducers, weighing modules and complete systems for process control and on-board weighing. Vishay Precision Group may be found on the Internet at