VPG Vishay Precision Group

Powertron Announces Industry’s First Ultra-High-Precision Current Sense Resistors to Achieve Low Resistance From 0.001 Ω With TCR of +/-2 ppm/K and Power to 50 W

VPG Foil Resistors, a Vishay Precision Group, Inc. (NYSE: VPG) product group, announced today that its Powertron brand has expanded its S-Line of precision Bulk Metal® Foil current sense resistors with the new SHLR series. For industrial and energy applications, the SHLR 4-2321, SHLR 4-3825, and SHLR 4-3825H are the industry’s first such devices to combine low resistance down to 0.001 Ω, TCR to +/-2 ppm/K, and high power ratings up to 50 W.

Offering load stability to 0.1% for up to 2,000 hours, the resistors released today provide highly accurate and reliable current measurement in industrial instrumentation and battery management systems, as well as smart energy grids and solar and wind inverters. For these applications, the devices feature a wide range of power ratings — from 3 W in free air to 50 W when mounted on a heatsink — and resistance values from 0.001 Ω to 0.005 Ω with tight tolerances to +/-0.1%.

The SHLR series achieves its very low TCR in the standard working range of +20°C to +60°C thanks to Bulk Metal Foil® technology based on CuMnSn metal foil. Its nearly flat TCR curve will help engineers to design more precise equipment or to upgrade existing systems.

SHLR series resistors feature maximum currents to 150 A, very low inductance, thermal EMF of < 1 μV/K, thermal resistance down to 1.6 K/W, and an operating temperature range of -40°C to +130°C. Offered in anodized aluminum packages, the devices are RoHS-compliant and lead (Pb)-free.

Device Specification Table:

             
Part number  

SHLR 4-2321

 

SHLR 4-3825

 

SHLR 4-3825H

Resistance range (Ω)   0.001 to 0.005

Power

rating (W)

  Free air 70 °C   3   3   5
  With heatsink   40   50   50
Thermal resistance (K/W)   2.0   1.6   1.6
Voltage proof (VDC)   300   500   500
     

Samples and production quantities of the SHLR 4-2321, SHLR 4-3825, and SHLR 4-3825H resistors are available now, with lead times of eight weeks. The SHLR 4-2321, SHLR 4-3825, and SHLR 4-3825H 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.

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; Powertron can be reached at www.powertron.de.

Bulk Metal is a registered trademark of Vishay Precision Group, Inc. (VPG).

EN
13/10/2016

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