The Hammond 166 series offers economical single primary transformers suitable for a wide range of low voltage filament applications. These transformers feature an open style, channel bracket, and two-hole chassis mount design, ensuring easy integration into various systems. They are constructed with a dual bobbin design, eliminating the need for electrostatic shielding, and utilize Class B insulation (130 degrees C) for enhanced protection. UL listed and CSA certified, the 166J33 provides reliable performance and safety for industrial and electronic equipment.