Schneider Electric 8501L040 8 Pole Control Relay

Schneider Electric’s Square D 8501L040 is an eight-pole Class 8501 control relay with a 120 VAC coil, designed for industrial control panels that need to switch multiple circuits from a single device. It derives from the modular 8501 family, built on a four-pole base and expandable to eight poles by adding adder decks or cartridges, a configuration common to 8501 relays to tailor contact count to the application. The arrangement preserves the same coil voltage and mounting footprint while increasing the number of poles, enabling interlocking, sequencing, and multi-circuit control within one relay assembly. With a 120 VAC coil, it suits plant control systems that run on standard control power, and it is positioned for use in applications such as panel interlocks, start/stop sequencing, and multi-relay control in machines, conveyors, and HVAC panels where a compact, modular NEMA‑style relay is advantageous. As part of Square D’s legacy Class 8501 lineup, the 8501L040 offers compatibility with common accessories and add-on decks that allow users to scale from four poles to eight without replacing the base device, delivering a practical, field-expandable solution for multi-circuit control needs.