VTF Through-Hole Resistor Networks Vishay / Thin Film VTF Single In-Line Through-Hole Resistor Networks are designed to be used in analog circuits in conjunction with operational amplifiers. Engineers can use Vishay VTF Resistor Networks to achieve an infinite number of very low noise and high stability circuits for industrial, medical, and scientific instrumentation. VTF offers a low capacitance of <,0.1pF/PIN and is flame resistant (UL 94V-0 rating).