The 166JB24 is an open-style transformer for filament and low-voltage rectifier use. It operates with a 115V, 60 Hz primary input and provides a center-tapped 24 VAC RMS secondary output rated for 1A. With a power rating of 24 VA, this transformer features a dual bobbin design that removes the need for an electrostatic shield and has Class B insulation rated for 130°C. Designed for two-hole chassis mounting, it is UL Listed and CSA Certified, making it a reliable component for power supply circuits.