Schneider Electric LR3D3561 Thermal Iec Overload Relay

Product Description

The SCHNEIDER ELECTRIC LR3D3561 is a thermal IEC overload relay rated for 55 to 70 amps at up to 690 VAC. It protects three-phase motors from sustained overcurrent conditions by detecting heat buildup through a bimetallic thermal sensing element. When current exceeds the set trip threshold, the relay opens the control circuit before motor windings sustain damage. Trip Class 20 means the relay is calibrated to trip within 20 seconds at six times the full-load amp setting. Licensed electricians and industrial controls technicians install this device as part of motor starter assemblies in commercial and light industrial applications.

The LR3D3561 is designed for use with LC1D80 and LC1D95 contactors, making it a direct-fit component in motor starter combinations that follow IEC design standards. It suits applications where motor loads vary or where a wide adjustment range is needed to cover multiple motor nameplate ratings within a single relay. Typical installations include HVAC fan arrays, pump panels, compressor controls, and other three-phase motor-driven equipment in commercial or industrial settings.

Key Features

• Thermal sensing method detects sustained overcurrent without electronic components
• Wide current adjustment range of 55 to 70 amps covers multiple motor sizes
• Trip Class 20 calibration for motors with longer acceleration times
• 690 VAC rating suits a broad range of IEC-standard motor control applications
• Direct-fit pairing with LC1D80 and LC1D95 contactors for combination starter builds

Compatibility

Designed for use with Schneider Electric LC1D80 and LC1D95 contactors as part of an IEC-standard motor starter assembly.

Installation Notes

Installation should be performed by a qualified electrician in accordance with the NEC and applicable local codes. De-energize and lock out the motor control panel before mounting or wiring the relay. Verify the current adjustment dial is set to match the motor nameplate full-load amp rating before energizing the circuit. Do not bypass or jumper the overload relay contacts during commissioning testing.