LRD3357 is a three-pole thermal overload relay in Schneider Electric’s TeSys D family, rated for 37–50 A and designed to protect 3‑phase motors when used with LC1D40–LC1D95 contactors in 600 V systems. It uses a standard 2E thermal element with built‑in phase-loss protection as standard, providing protection against overload and phase loss. Compatible with TeSys D contactors LC1D40–LC1D95, the LRD3357 is commonly used in industrial motor protection schemes for 600 V alternating current motor circuits.
