Telemecanique LR1-D63357 Three-Phase Overload Relay

The Telemecanique LR1D63357 is a three-pole thermal overload relay in the TeSys LR1D family that provides adjustable overload and phase-failure protection for 3-phase motors. It covers an adjustable current range of 38–50 A, operates at up to 660 VAC, and uses Class 10A trip characteristics to help guard motors in demanding industrial runs. This OEM direct replacement part includes 2 normally open and 2 normally closed auxiliary contacts for signaling and control interlocks, and it supports mounting either directly or on a panel with screw-clamp terminals for secure wiring. Designed to work with TeSys motor starters and contactors, the LR1D63357 (Manufacturer Part Number LR1D63357) is commonly found in motor control centers, conveyors, compressors, pumps, HVAC equipment, and other industrial automation applications where reliable protection for medium- to high-power motors is essential. Common replacements include Schneider Electric LR1D63357 and Telemecanique LR1D63357, reflecting its role as a standard, interchangeable protection device in manufacturing plants, material handling, water treatment, process industries, mining equipment, and industrial control panels.