Vishay introduces the Power Metal Strip current sense resistor that provides a 3W power in just a 1216 case size. The WSK1216 uses a Kelvin 4-terminal connection for measurement accuracy as well as a 0.001Ω resistance, minimising power losses.

The WSK1216 packs some 260 W/in2 power density and a 4-terminal connection, which enables accuracy and a reduction in system errors compared to a 2-terminal device.

The WSK1216 uses a solid metal manganese-copper alloy with < 20 ppm/°C TCR and 1 percent tolerances. A processing technique enables a resistance value of 0.001Ω. The device provides a thermal EMF of < 3 µV/°C, an inductance of 0.5nH, a temperature range from -65°C to 170°C, and a solder temperature up to 350°C for 30s.

The resistor can be used for all types of current sensing, voltage division, and high-pulse load in power management applications such as in electronic controls in engine, transmission, anti-lock brake, intelligent parking brake, audio, and climate controls; and inverter controls for down-hole test and measurement equipment and commercial HVAC systems. The device is RoHS-compliant, halogen-free, and Vishay Green.

Samples and production quantities of the WSK1216 are currently available, with six to eight weeks lead time for larger orders.