MMx Precision Series MELF Resistors Vishay MMx Precision Series MELF Resistors are advanced-technology precision thin film resistors that combine the proven reliability of professional products with advanced precision and stability. These AEC-Q200-qualified resistors offer advanced metal film technology, high pulse load capability, and intrinsic sulfur resistance. Vishay MMx Precision Series MELF Resistors are ideally suited for applications in the fields of test and measuring equipment along with industrial and medical electronics.