Schneider Electric LRD03 TeSys Deca 0.25-0.4A Thermal Overload Relay

The Schneider Electric LRD03 is a TeSys Deca series thermal overload relay designed to provide reliable motor protection across a 0.25–0.4 A current adjustment range. As a bimetallic overload relay, the LRD03 safeguards three-phase and single-phase motors against sustained overcurrents, phase failure, and overheating — making it an essential component in motor starter assemblies paired with TeSys Deca contactors. Engineered for industrial panel builders and OEMs, the LRD03 offers precise current setting and robust thermal trip performance in a compact DIN-rail compatible format.

Technical Specifications

Applications & Use Cases

• Motor Starter Assemblies: Pairs directly with TeSys Deca contactors for compact, IEC-compliant motor starters in control panels.
• Low-Power Motor Protection: Ideal for protecting small three-phase motors operating at low current ratings in conveyors, pumps, fans, and HVAC equipment.
• OEM Machine Building: Suitable for machine builders requiring reliable thermal protection in a standardised, interchangeable relay format.
• Industrial Automation Panels: Used in MCC (Motor Control Centre) builds where space-efficient, bimetallic overload protection is required.

Frequently Asked Questions

• What contactor does the LRD03 mount to? The LRD03 is designed to plug directly onto TeSys Deca series contactors (LC1D / LC1E family), enabling tool-free assembly.
• Does the LRD03 support manual and auto reset? TeSys Deca thermal relays typically support both manual and automatic reset modes; select the reset mode appropriate for your application's safety requirements.
• What is the current setting range of the LRD03? The LRD03 covers a 0.25–0.4 A adjustment range, making it suitable for very small motors and low-current loads.
• Is the LRD03 suitable for phase failure detection? TeSys Deca overload relays provide phase failure sensitivity, protecting motors against single-phasing conditions.