Schneider Electric (Square D) LRD35 30/38A Class 20 Overload Relay

Description

The Schneider Electric (Square D) LRD35 is a Class 20 thermal overload relay engineered for dependable motor protection in demanding HVAC and industrial applications. Designed to pair directly with TeSys D series contactors, this overload relay provides precise, adjustable trip protection to safeguard motors from overload conditions, phase loss, and prolonged overcurrents.

Product Overview

The LRD35 features an adjustable current range of 30 to 38 amps, making it well-suited for protecting three-phase motors in commercial HVAC equipment, air handling units, pumps, compressors, and fan systems. Class 20 tripping characteristics allow motors with higher inertia loads to start successfully before the relay trips, reducing nuisance tripping in demanding start-up conditions.

Key Features

• Adjustable current setting range: 30–38A
• Class 20 tripping class for high-inertia motor loads
• Direct mounting onto TeSys D series contactors for compact, integrated assembly
• Built-in phase loss sensitivity to detect single-phasing conditions
• Manual and automatic reset options for flexible system recovery
• Integrated test and reset button for easy commissioning and maintenance
• Auxiliary contacts included for remote signaling and control circuit integration
• Compact DIN rail or contactor-mount design saves panel space

Application Suitability

• Commercial HVAC motor starters and control panels
• Chiller, air handler, and rooftop unit motor protection
• Pump and compressor motor circuits
• Industrial and light commercial electrical distribution systems

Why Choose the LRD35

Schneider Electric’s TeSys D overload relays are globally recognized for their reliability and ease of integration. The LRD35 snaps directly onto compatible TeSys D contactors, eliminating the need for separate wiring between the contactor and overload relay and reducing installation time. Its rugged construction and proven tripping accuracy make it a trusted choice for HVAC professionals and electrical contractors alike.