Siemens Furnas 52PA4GN is a Class 52 heavy‑duty transformer‑type pilot light designed for 120 VAC operation in industrial control panels. The no‑lens variant (without an external lens) is built as part of Siemens’ 52-series 30 mm pilot devices and is designed to accept an internal transformer to drive illumination, with an oil-tight housing for rugged environments. Although Siemens Furnas lists 52PA4GN as discontinued, distributors continue to stock this model as a replacement part in legacy equipment.
