The Hammond 166J12 is an economical single primary filament transformer designed for various applications requiring low voltage power. Its open style, channel bracket, and two-hole chassis mount construction offer versatility in installation. The transformer features a dual bobbin design eliminating the need for electrostatic shielding and utilizes Class B insulation for enhanced protection. It is UL listed and CSA certified, ensuring compliance with industry standards. Suitable for applications needing 115V 60Hz operation, this transformer provides a reliable and cost-effective power solution.