Check the listing for details. SQUARE D Square D Control Relay Class 8501 Type X Series A. Condition: Used, Made in United States. Listed at 16.19 USD. This Square D Control Relay Class 8501 Type X0 80 Series A is a reliable and efficient module for industrial automation and motion control applications. It is designed to work with PLCs and HMIs and is suitable for use in various industries. The brand is known for its quality products, and this model is no exception. With its unique features and capabilities, this control relay is a great choice for anyone looking to upgrade their industrial automation system. It is easy to install and integrate with other modules, and its durability ensures long-lasting performance. Whether you're looking to streamline your processes or increase productivity, this Square D Control Relay Class 8501 Type X0 80 Series A is the perfect solution.