Schneider Electric 8501XD040XDLV66 Industrial Control Relay

Schneider Electric’s Square D 8501XD040XDLV66 is a NEMA Type X control relay intended for machine‑tool applications, featuring four normally open contacts and a 230/250 VDC coil (latching variant in the 8501 X family). This unit is listed as NOS and, according to Schneider Electric, was discontinued on July 1, 2020, though new old stock remains available through distributors. The 8501 Type X family is designed for industrial control tasks such as panel‑mounted logic and machine controls, providing a compact electromechanical relay option for automation circuits where four isolated NO contacts and a DC coil are appropriate. NOS listings from third‑party sources also identify this model as Series B and part of the 8501XD/XDO/XDLV66 lineage used in industrial control relays for machine tools and related equipment.