Schneider Electric LRD21 TeSys Deca 12-18A Thermal Overload Relay

The Schneider Electric LRD21 is a TeSys Deca series thermal overload relay rated for a 12–18 A adjustable current range, designed to provide reliable motor protection against overload and phase-loss conditions in industrial automation and control panel applications. The LRD21 mounts directly onto TeSys D-series contactors, delivering a compact and efficient motor starter assembly. Weighing just 0.375 kg, it is an ideal choice for machine builders and panel builders requiring dependable overload protection.

Technical Specifications

Applications & Use Cases

• Motor Protection: Protects three-phase induction motors from thermal overload and phase-loss faults in industrial environments.
• Control Panels: Integrates seamlessly into motor control centers (MCCs) and industrial control panels paired with TeSys D contactors.
• Industrial Automation: Suited for conveyors, pumps, compressors, fans, and general-purpose machine drives requiring 12–18 A overload protection.
• OEM Machine Building: Compact footprint and direct-mount design make the LRD21 a preferred choice for original equipment manufacturers building automated machinery.