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Powertron Announces New Current Sensing COTS Resistors With TCR to ±2 ppm/K and Power Ratings to 2500 W
MALVERN, Pa. — June 10, 2015 — Powertron, a Vishay Precision Group, Inc. (VPG) brand, today announced the expansion of its S-Line of precision foil current sense resistors with five new SHR series devices. Offered in a wide range of anodized aluminum package sizes, the made-in-Germany SHR 4-8065, SHR 4-80110, SHR 4-80216, SHR 4-80320, and SHR 4-80370 combine a low TCR of ±2 ppm/K with extremely high power ratings to 2500 W.
Offering load stability to 0.1% for up to 1,000 hours, the RoHS-compliant SHR 4-8065, SHR 4-80110, SHR 4-80216, SHR 4-80320, and SHR 4-80370 provide highly accurate and reliable current sensing in industrial power supplies, digital multimeters, current control systems, medical equipment, solar and wind inverters, and AC/DC converters, as well as systems such as battery chargers and test equipment for electric cars.
The resistors released today offer a wide range of power ratings — from 24 W in free air to 2500 W when mounted on a heatsink — with low resistance values from 0.005 Ω to 300 Ω and tight tolerances to ±0.1%. The devices feature maximum currents to 60 A (with higher values and currents available upon request), very low inductance of < 50 nh, thermal EMF of < 1 µV/°C, and a temperature range of -40°C to +130°C.
"The choice of a precision resistor can have far-reaching effects on system performance," said Kai Karstensen, managing director of Powertron. "For measurement instruments, semiconductor test equipment, consumer electronics, and other applications that demand stability, reliability, and precision, our SHR series of foil current sense resistors offers the perfect solution."
Device Specification Table:

Type

Resistance range (Ω)

Power rating (W)

Dimensions (mm)

Free air

70°C

With heatsink

SHR 4-8065

0.005 to 100

24

350

65 x 80 x15

SHR 4-80110

0.005 to 150

32

600

110 x 80 x15

SHR 4-80216

0.01 to 200

60

1200

216 x 80 x15

SHR 4-80320

0.002 to 250

80

2000

320 x 80 x15

SHR 4-80370

0.003 to 300

90

2500

370 x 80 x15

Samples and production quantities of the SHR 4-8065, SHR 4-80110, SHR 4-80216, SHR 4-80320, and SHR 4-80370 resistors are available now, with lead times of four to five weeks.
About Powertron
Powertron, a brand of Vishay Precision Group, Inc. (VPG), develops, manufactures, and markets high-precision foil, current sense, and thick film resistors for use in diverse applications and offers a full complement of resistors for accurate, precise, and high-power circuits, with customization capabilities supporting virtually any package type. Powertron focuses on delivering solutions with the best combination of power ratings, TCR, and resistance ranges with foil resistor products that include devices built on CuNiMn Bulk Metal® Foil for low-ohm, high-precision applications and NiCr foil for even higher levels of stability. A thick film product line is also available in a wide range of packages. Further information is available at www.powertron.de.
About Vishay Precision Group, Inc. (VPG)
VPG 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.