Vishay Intertechnology, Inc. has recently introduced a new Power Metal Strip™ current-sense resistor, the WSKW0612, designed for high-precision applications. This surface-mount component features a compact 0612 package and delivers a power rating of 1.0W—four times that of the standard 1206 size. The enhanced power capability allows engineers to optimize board space, reduce component count, and lower overall system costs.
The WSKW0612 incorporates a welded copper joint construction along with a Kelvin 4-terminal configuration, which significantly reduces thermal coefficient of resistance (TCR) to as low as 75 ppm. This design minimizes measurement errors and improves accuracy, especially in high-current applications. With a resistance range from 0.001 Ω to 0.003 Ω, the resistor ensures minimal power loss and improved efficiency in power management systems.
Constructed using Vishay's proprietary technology, the WSKW0612 features a solid metal nickel-chromium and manganese-copper core, offering excellent stability under pulse conditions and maintaining tight tolerances. The device also boasts a thermal EMF of less than 3μV/°C and operates within an extended temperature range of -65°C to +170°C, making it suitable for demanding environments.
This resistor is ideal for a wide range of applications, including mobile phone power management, server DC/DC converters, laptop VRMs, lithium-ion battery systems, industrial instrumentation, air conditioning inverters, automotive control systems, and more. It meets RoHS and Vishay Green standards, ensuring compliance with environmental regulations.
For further details, Vishay provides an application note titled "Wells of WSKW0612 Welded Joints," which explores the benefits of the welded joint and Kelvin connection, comparing them with traditional copper-clad or plated joints. The document also includes layout recommendations for optimal performance.
The WSKW0612 is now available in volume production, with lead times ranging from six to eight weeks for large orders. This new component is a valuable addition to the growing portfolio of high-performance, precision resistors from Vishay.
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