Schneider Electric DD240.0 480V 164.-175.A S Contactor

Schneider Electric's Square D DD240.0 Melting Alloy Thermal Unit (Class 20) is a replacement thermal overload device for DD-series definite‑purpose contactors, designed to protect motors and other inductive loads by melting a built‑in alloy when current reaches its rated threshold. It is rated for 164–175 A and up to 600 V, making it suitable for use in industrial panels where 480 V circuits are common. This thermal unit is used as part of motor control circuits to provide thermal protection by opening the circuit if an overload occurs, helping prevent motor damage and equipment downtime. The DD240.0 is part of the Square D/Schneider Electric range of thermal overload heaters and is specifically specified for DD-series devices, offering a Class 20 trip characteristic appropriate for general purpose motor protection in commercial and light industrial applications.