Lenze AC Tech SN103S Variable Frequency Drive

Lenze AC Tech SN103S is a compact variable-frequency drive (VFD) designed for small AC motors, with a single-phase 110–120 VAC input and a nominal output of 1/4 HP. It belongs to the SN100S Series, a line of small-form drives that provides adjustable speed control at 50/60 Hz from a single-phase supply. The SN103S accommodates output currents around 1.4–1.6 A, depending on frequency settings and configuration. This model is listed as discontinued by the manufacturer, meaning current availability is typically through distributors or surplus stock. In practice, the SN103S offers straightforward wiring and basic speed-control capabilities for lightweight applications where space and simple installation are important.