WSF SMD Metal Film Power Resistors Vishay / Dale WSF SMD Metal Film Power Resistors offer molded encapsulation, wraparound terminals, and high stability while in various environmental conditions. These resistors feature wide operating temperature ranges up to +175°C in a 5.0Ω to 100KΩ resistance range with high power ratings up to 2W. The WSF Resistors are AEC-Q200 compliant and are ideal for automotive controls, networking/line cards, and other high-temperature applications.