The Hammond 166L10 is an economical single primary filament transformer suitable for a variety of applications requiring 115V 60Hz operation. Its open style, channel bracket, and two-hole chassis mount design offer versatility in installation. The transformer's dual bobbin construction eliminates the need for electrostatic shielding, while Class B insulation (130 degrees C) provides enhanced protection. It undergoes a Hi-Pot test of 2,000V RMS and is UL listed and CSA certified, ensuring reliable performance and safety.