The WAF current sensing precision resistor series is part of the WAx resistor family from Isabellenhütte. This resistor series offers excellent long-term stability and low thermoelectric voltages. The available resistance values are 0.487 mΩ, 0.5 mΩ, 0.991 mΩ and 1 mΩ, with tolerance values of ±1% and ±5% available, and temperature coefficient 0 – 30 ppm/°C. The WAF series from Isabellenhütte also features a constant current of up to 77A (at 1 mΩ), power rating of up to 3.5W (at 140°C) and is suitable for reflow soldering. These resistors are AEC-Q200 qualified. Their operating temperature range is between -65°C and +170°C.

• Current sensing precision resistor
• Constant current up to 77A (1mOhm)
• AEC-Q200 qualified
• Resistance range from 0.000487Ω to 0.001Ω
• Tolerances of ±1.0% and ±5.0%
• TCR down to ±40ppm/K
• Power rating up to 3.5W (at 70°C)
• Temperature range from -65°C to +170°C
• Max. solder temperature up to 350 °C / 30 sec
• Suitable for reflow soldering
• Inductance of <0.5nH
• Stability of <0.5% (T_K=140 °C) / <1% (T_K=175°C) (at rated power, deviation after 2000h)

_{Further details can be found on the product datasheet}

Typical applications for the WAF current sensing precision shunt resistor series include:

• Current sensor for power hybrid applications
• High current applications for the automotive market
• Frequency converters
• Power modules

Isabellenhütte is one of the world’s leading suppliers of high-quality precision and power resistors. They produce these low-resistance resistors for a variety of applications such as the ones above. Isabellenhütte & Rhopoint Components are your ideal partners when it comes to achieving the best possible measurement results in the smallest spaces. Please visit www.isabellenhuette.de for more information.