SMA-A MELF Resistors TE Connectivity's (TE) SMA-A Metal Electrode Leadless Face (MELF) Resistors are metal film precision MELF resistors with an SMD-enabled structure. These resistors offer tight tolerance and low TCR (Temperature Coefficient of Resistance). The SMA-A resistors are available in three different sizes and six power ratings. Typical applications include automotive, industrial, telecommunication, and medical equipment.