Square D LR3D TeSys Deca Class 10A Thermal Overload Relay

Square D LR3D TeSys Deca Class 10A Thermal Overload Relay

The Square D LR3D TeSys Deca Class 10A Thermal Overload Relay is a contactor-mounted motor protection device designed to pair directly under a compatible TeSys D-series contactor in commercial and industrial control panels. This relay is available across a Motor FLA range spanning 2.5...4A up to 7...10A, allowing panel builders to match thermal setting to the connected motor's full-load amperage. Every model in the family shares a Class 10A tripping curve per IEC 60947-4-1, a power circuit rated insulation voltage of 600V UL / 690V IEC 60947-4-1 / 600V CSA, a rated operational voltage of 690V AC (0...400 Hz), and an IP20 degree of protection conforming to IEC 60529. Built for unbalanced-load circuits and standard motor duty cycles, it delivers reliable, code-compliant overload protection for motors such as 1.1-1.5kW @ 400V applications.

Key Features

• Motor FLA Range: Available from 2.5...4A through 7...10A to match a range of TeSys D-compatible motor loads.
• Thermal Overload Class: Class 10A tripping curve per IEC 60947-4-1 with a tripping threshold of 1.14 +/- 0.06 Ir, suited for standard motor duty cycles.
• Rated Voltage: Power circuit rated insulation voltage of 600V UL / 690V IEC 60947-4-1 / 600V CSA, with a rated operational voltage of 690V AC, 0...400 Hz.
• Contactor-Mounted Design: Mounts under the contactor, on a plate, or on rail with specific accessories for flexible panel layouts.
• Control Type: Integrated red push-button stop and blue push-button reset for quick manual intervention.
• Ingress Protection: IP20 degree of protection conforming to IEC 60529.
• Ambient Temperature Range: Rated for operation from -20 to 60°C without derating, per IEC 60947-4-1.
• Contactor Compatibility: Compatible with TeSys D contactors including LC1D09, LC1D12, LC1D18, LC1D25, LC1D32, and LC1D38.
• Terminals: Screw clamp control circuit terminals accepting 1-2.5 mm² flexible conductors without cable end, tightened to 1.7 N.m.

Certifications & Compliance

• UL Listed to UL 60947-4-1 and UL 60947-5-1
• CSA C22.2 No 60947-4-1 and No 60947-5-1
• EN/IEC 60947-4-1 and EN/IEC 60947-5-1
• RoHS EUR Compliant
• Flame retardance V1 conforming to UL 94

Technical Specifications

• Uimp Rated Impulse Withstand Voltage: 6 kV
• Temperature Compensation: -20-60 °C
• Warranty: 18 months
• Toxic Heavy Metal Free: Yes
• Mercury Free: Yes
• ROHS Eur In Scope: Yes
• Country of Origin: FRA

Typical Applications

• Motor Control Centers and Starter Panels
• Commercial and Industrial Machine Control
• TeSys D Contactor-Based Motor Circuits
• Pump, Fan, and Conveyor Motor Protection
• Panel Retrofits and New Motor-Control Installations

Why Square D?

Square D LR3D TeSys Deca overload relays combine UL, CSA, and IEC 60947-4-1/5-1 compliance with flame-retardant V1-rated construction for dependable operation in demanding control environments. Backed by an 18-month warranty and designed to pair directly with TeSys D contactors across the full 2.5...10A FLA range, they deliver code-compliant motor protection that panel builders and electrical contractors can install with confidence.