The WSLF2512 Power Metal Strip® current sense resistor. Source: Vishay Providing a power density of 192 W/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 advanced construction of the WSLF2512 incorporates a solid metal nickel-chrome, manganese-copper, or manganese-copper-tin alloy resistive element with low TCR (< 20 ppm/°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 0.0003 Ω to 0.003 Ω, with tolerances of ±1.0% and ±5.0%. The device provides low thermal EMF (< 3 µV/°C), very low inductance (< 2 nH), and a temperature range from –65° C to +170° C.
The resistor 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.
Samples of the WSLF2512 are available now. Production quantities are available with a lead time of six to eight weeks for larger orders.
