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New VPG Foil Resistors’ CSM3637F Four-Terminal Bulk Metal® Z Foil High Precision Current Sense Resistor Combines Excellent Load-Life Stability With Low TCR for Applications to 3 W
MALVERN, Pa. Oct. 31, 2016 VPG Foil Resistors, a Vishay Precision Group, Inc. (NYSE:VPG) product group, announced today that its Vishay Foil Resistors brand has introduced a new current sense resistor for the medical, energy, military and aerospace markets. The high-precision, surface-mount, four-terminal CSM3637F current sense resistor is an industry first due to its size in combination with an improved load-life stability of ±0.02% at +70°C for 2,000 hours with a low TCR of ±5 ppm/°C max from -55°C to +125°C and a high power rating up to 3 W.
The CSM3637F resistor is optimized for high-precision current sensing applications in switching linear power supplies, power amplifiers, power management systems, feedback circuits, measurement instrumentation and automatic test equipment. The device features a resistance range from 50 mΩ to 200 mΩ with any conceivable ohmic value within this range — out to six digits — available with no additional cost or lead time effect. The resistor provides ESD immunity to 25 kV or more, power coefficient of resistance (ΔR due to self-heating) of 5 ppm/W at rated power, and tight tolerance of ±0.1%.
The CSM3637F resistor’s unique combination of Bulk Metal® Z Foil Technology and a four-terminal Kelvin connection results in a significant reduction of the device’s sensitivity to applied power changes such as power coefficient of resistance (PCR) and thermal resistance, while its low TCR reduces errors due to temperature changes. Short-time overload tests applying 10 W power for 5 seconds on the device were passed with a maximum ∆R of 0.01%.
“The CSM3637F resistor is the ideal solution for applications up to 3 W where the emphasis is on accuracy and repeatability under stressed conditions and swift current changes, such as current power supplies, deflection amplifiers, electron microscopes, electron beam systems and force-balanced scales,” said Jacky Acoca, sales and marketing director, VPG Foil Resistors. “Such products require a precise voltage proportional to the current, and the CSM3637F resistor delivers with its unique design, low TCR, and excellent load-life stability.”
“The stability of Bulk Metal® Z Foil resistors, as well as the other basic advantages apparent in Bulk Metal® Z Foil specifications, will not only provide unequalled performance in the circuit, but will eliminate all the costs associated with extra compensation circuitry,” added Hero Faierstain, application engineering senior manager, Vishay Foil Resistors. “With the CSM3637F, only a minimal shift in resistance value will occur during its entire lifetime. Most of this shift takes place during the first few hundred hours of operation, and virtually no change is noted thereafter.”
Samples and production quantities of the new CSM3637F resistors are available now with lead times of five to eight weeks, either RoHS-compliant (lead (Pb)-free) or with tin/lead alloy terminations. The CSM3637F resistors will be among the products on display during electronica 2016 at the VPG Foil Resistors booth B6/116 at the Messe München, November 8-11.
The newly redesigned www.vpgfoilresistors.com web site offers detailed information on the industry’s most precise and stable resistors from the Vishay Foil Resistors, Powertron, and Alpha Electronics brands, including videos, application notes, datasheets and market-related information.
Additional information about the CSM3637F and other Vishay Foil Resistors products is available at www.vishayfoilresistors.com. Follow Vishay Foil Resistors at twitter.com/foilresistor.
About VPG
Vishay Precision Group, Inc. is an internationally recognized designer, manufacturer and marketer of: components based on its resistive foil technology; sensors; and sensor-based systems specializing in the growing markets of stress, force, weight, pressure, and current measurements. VPG is a market leader of foil technology products, providing ongoing technology innovations in precision foil resistors and foil strain gages, which are the foundation of the company’s force sensors products and its weighing and control systems. The product portfolio consists of a variety of well-established brand names recognized for precision and quality in the marketplace. To learn more, visit VPG at www.vpgsensors.com.
About VPG Foil Resistors
VPG Foil Resistors produces the most precise and stable resistors available. Distinguished by the premier brands Vishay Foil Resistors, Powertron, and Alpha Electronics, the VPG Foil Resistors portfolio includes discrete resistors and resistor networks in surface mount and through-hole (fixed-lead) configurations; customized chip resistor networks; precision trimming potentiometers; and discrete chips for use in hybrid circuits. These devices are used in applications requiring a high degree of precision and stability, such as in medical testing equipment, semiconductor equipment, precision measuring instruments, aerospace, and military applications. To learn more about VPG Foil Resistors, visit www.vpgfoilresistors.com; Vishay Foil Resistors can be reached at www.vishayfoilresistors.com.
Bulk Metal is a registered trademark of Vishay Precision Group, Inc. (VPG).