New Industry Products

6W Current-Sense Resistor Increases Accuracy and Efficiency

November 13, 2016 by Jeff Shepard

Vishay Intertechnology, Inc. announced a new surface-mount Power Metal Strip® current-sense resistor that combines a high power rating up to 6W, TCR down to ±70ppm / degree C, and extremely low resistance values down to 0.0003Ω in the 2512 case size.

Providing a power density of 192W / in², the Vishay Dale WSLF2512 allows designers to save board space in high-power circuits by utilizing the smallest resistor possible. The device’s low TCR provides stable and accurate current measurement across a wide temperature range, while its low resistance values minimize power losses and improve end product efficiency.

The WSLF2512’s advanced construction incorporates a solid metal nickel-chrome, manganese-copper, or manganese-copper-tin alloy resistive element with low TCR (<20ppm / degree C). This results in a higher-power resistor in a smaller size that maintains the superior electrical characteristics of the Power Metal Strip construction.

A proprietary processing technique produces resistance values ranging from 0.0003Ω to 0.003Ω, with tolerances of ±1.0% and ±5.0%. The device provides low thermal EMF (<3μV / degree C), very-low inductance (<2nH), and a temperature range from -65 to +170 degrees C.

The resistor released today is ideal for all types of current sensing, voltage division, and pulse applications in power management for automotive electronic controls such as engine, transmission, anti-lock brakes, audio, and climate controls; inverter controls for down-hole test and measurement equipment and HVAC systems; and VRMs for servers. The device is RoHS-compliant, halogen-free, and Vishay Green.

Samples and production quantities of the WSLF2512 are available now, with a lead time of six to eight weeks for larger orders.