Schneider Electric LRD21 12-18A Overload Relay

The Schneider Electric TeSys LRD21 thermal overload relay is a three-pole protective device that mates with TeSys D contactors to form a complete motor starter, rated for up to 690 V AC and designed for robust motor protection in industrial control panels. It provides differential thermal overload protection with an adjustable current setting of 12 to 18 A and a class 10A thermal-trip rating, and it includes a built-in 1 NO + 1 NC auxiliary contact for signaling or interlocking in control circuits. The unit uses screw-clamp terminals for secure wiring and is designed for use with TeSys D contactors in standard motor-start circuits within Schneider Electric's TeSys Deca protection family. Typical applications include conveyors, pumps, fans, and other small to medium motors where precise overload protection is required, with the LRD21 serving as the dedicated protection element within Schneider Electric's motor-starter ecosystem. Designed for operation with 50/60 Hz power, it integrates cleanly into standard motor-control architectures across a range of industrial environments.