The Hammond 166L16 is an economical single primary filament transformer designed for a wide range of applications. It offers a 115V 60Hz primary voltage and a 16 VAC secondary voltage with a center tap, providing flexibility in circuit design. The open-style chassis mount design, coupled with its dual bobbin construction and Class B insulation, ensures reliable performance and safety. Commonly used in lighting, small appliances, and other low-voltage applications, the 166L16 delivers a cost-effective solution for power transformation needs.