Description
The Schneider Electric (Square D) LRD10 is a thermal overload relay designed to provide reliable motor protection in commercial and industrial HVAC and mechanical systems. Engineered as part of the TeSys D series, this relay mounts directly onto compatible LC1-D series contactors for a compact, integrated motor starter assembly.
The LRD10 safeguards motors against damaging overloads, phase loss, and phase imbalance conditions, making it an essential component in fan motor circuits, pump starters, compressor controls, and other motor-driven HVAC equipment.
Key Features
- Current range: 4–6 A, adjustable via front-mounted dial
- Designed for direct mounting on TeSys D (LC1-D09 to LC1-D38) contactors
- Provides protection against overload, phase loss, and phase imbalance
- Manual and automatic reset modes
- Integrated test and stop button for commissioning and maintenance
- Differential trip function detects phase imbalance conditions
- Trip class: Class 10A for standard motor applications
- Auxiliary contacts: 1 NO + 1 NC for remote signaling or control circuit interruption
- Compact DIN-rail compatible design for panel mounting flexibility
Specifications
- Brand: Schneider Electric (Square D)
- Model / SKU: LRD10
- Current Setting Range: 4–6 A
- Series: TeSys D
- Compatible Contactors: LC1-D09 through LC1-D38
- Reset: Manual / Automatic (selectable)
- Trip Class: Class 10A
- Auxiliary Contacts: 1 NO + 1 NC
Applications
- HVAC fan and blower motor starters
- Hydronic circulator pump motor protection
- Compressor and refrigeration motor control panels
- Commercial and light industrial motor control centers
- Air handling unit motor protection circuits
The LRD10 is a trusted solution for HVAC contractors and panel builders seeking dependable motor protection in a compact, direct-mount format. Its adjustable current range and selectable reset mode make it versatile across a wide range of motor applications.







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