S Series Bulk Metal®Foil Resistors Vishay Precision Group S Series Resistors were constructed with Vishay's Bulk Metal® Foil (BMF) technology that exhibits better performance than all other resistor technologies available today for applications that require high precision and high stability. The S resistor series from Vishay Precision Group is virtually insensitive to destabilizing factors and its solid alloy construction offers the desirable bulk properties of its parent material, making it intrinsically stable and noise-free. Features of the S Series Foil Resistors include low TCR, excellent load life stability, tight tolerance, fast response time, low current noise, low thermal EMF and low voltage coefficient.