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Vishay's New Low-Value Power Metal Strip® Resistors Provide Resistance Values From 0.2 to 4.0 Milliohms With Tolerances of 1.0% and 5.0%

MALVERN, PENNSYLVANIA — Vishay Intertechnology, Inc. announced two new low-value, surface-mount Power Metal Strip® resistors with power ratings of 3.0 W and 5.0 W and extremely low resistance values down to 0.2 mΩ.

The new Vishay Dale WSL3921 and WSL5931 are ideal for all types of current-sensing, voltage division, and pulse applications including switching and linear power supplies, instruments, and power amplifiers in automotive electronic controls; battery-charging systems and motor controls in consumer products; and motor controls in industrial systems.

The new WSL3921 resistor measures 0.394 in. by 0.205 in. [10.0 mm by 5.2 mm] with a maximum height profile of 0.071 in. [1.80 mm], and the WSL5931 resistor measures 0.591 in. by 0.305 in. [15.0 mm by 7.75 mm] with a height profile of 0.068 in. [1.73 mm]. A proprietary processing technique produces low resistance values ranging from 0.2 mΩ to 4.0 mΩ with tight tolerances of 1.0% and 5.0%.

Like all Power Metal Strip resistors, the new devices released today feature an all-welded construction that contributes to their superior electrical performance. The WSL3921 and WSL5931 provide very low inductance of 0.5 nH to 5 nH, extdent frequency response, and low thermal EMF. They also provide good overload capability, using the printed circuit board as a cooling device, and long-term stability through a broad range of environmental conditions. As a result, the WSL3921 and WSL5931 enable design of higher-performing, longer-lasting end products.

The accuracy and low resistance values of the WSL3921 and WSL5931 resistors enable designers to use less-expensive ICs and help end systems to operate at maximum performance. These new resistors also enable designers to use a single low-value resistor in place of multiple high-value resistors running in parallel.



New WSL Power Metal Strip Resistors: Summary Table

ModelPower Rating (W)Resistance Values (mΩ)Tolerance (%)
WSL39213.00.3, 0.5, 1, 2, 3, 41.0, 5.0
WSL59315.00.2, 0.3, 0.5, 1, 2, 31.0, 5.0

The WSL3921 and WSL5931 devices feature a solid metal nickel-chrome or manganese-copper alloy resistive element. They are available in tape-and-reel packaging. Samples and production quantities of the new WSL resistors are available now, with a lead time of four to six weeks for larger orders.

Martes, 18 Octubre, 2005 - 05:07
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