Vishay CSM3637Z precision resistors

Vishay has released precision Bulk Metal Foil surface-mount Power Metal Strip current-sensing resistors with a load-life stability of ±0.2% at +70°C for 2000 h at rated power.

The CSM3637Z also features an absolute TCR of ±5 ppm/°C maximum from -55 to +125°C, +25°C ref and a tolerance of ±0.1%. It uses processing techniques that result in extremely low resistance values of 3 to 50 mΩ.

The improved resistance stability makes it suitable for tightened-stability voltage division, precision current sensing and pulse applications in switching and linear power supplies, power amplifiers, feedback circuits, measurement instrumentation, bridge networks, satellites and aerospace systems, medical and test equipment.

The device’s stability can be further enhanced by post-manufacturing operations that are applicable to Bulk Metal Foil Technology, such as temperature cycling, short-term overload and accelerated load-life.

The device features a low thermal electromotive force that is critical in many precision DC applications.

Featuring a four-terminal (Kelvin) design for precise and accurate current measurement, the resistor offers a power rating of 3 W for a resistance range of 3 to 10 mΩ and 2 W for 10 up to 50 mΩ. VFR foil resistors are not restricted to standard resistance values, and they can be supplied with ‘as required’ values (eg, 10.2345 mΩ vs 10 mΩ). The device features a maximum current up to 31 A, inductance of 0.5 nH, frequency response to 50 MHz and short time overload of ±0.1% typical.