Square D 9070EO1D1 Industrial Control Transformer

Square D by Schneider Electric 9070EO1D1 Industrial Control Transformer delivers 50 VA of isolated 120 VAC control power from a 240/480 VAC mains in a rugged EO‑style, chassis‑mount package designed for panel installations in harsh industrial environments. It accepts dual primary voltages of 240 V or 480 V at 50/60 Hz and provides a 120 V secondary, with an 80°C rise rating to handle hot control panels. This 1‑phase transformer is a common replacement for older S30021‑503‑51 units and is part of the Square D EO family known for reliable voltage regulation and compact footprint, making it well suited for powering relays, contactors, and other control devices in industrial machinery and panel boards. The 50 VA rating indicates it can supply modest control loads without overheating, while the 50/60 Hz compatibility ensures operation with typical North American electrical systems. Designed for easy field installation in control cabinets, it features standard mounting provisions and a robust enclosure built to withstand the demands of industrial environments.